expect/actual classes: experimental -> Beta

KT-61573
^KT-61712 Fixed
Review: https://jetbrains.team/p/kt/reviews/12044/files

It's a follow up commit

According our guidelines, it must be in Beta
https://kotlinlang.org/docs/components-stability.html#stability-of-subcomponents

And the whole multiplatform was in Beta, so we can't make part of the
multiplatform to have lower stability level

compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/output.txt

@@ -1,22 +1,22 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class AB { A, B }
 ^
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:24: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:24: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class AB { A, B }
                        ^
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:27: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:1:27: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class AB { A, B }
                           ^
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class CD { C, D }
 ^
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:24: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:24: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class CD { C, D }
                        ^
-compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:27: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/enumsWithDifferentEntries/common.kt:3:27: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class CD { C, D }
                           ^
 

compiler/testData/multiplatform/classScopes/fakeOverrides/output.txt

@@ -1,25 +1,25 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect open class Base {
 ^
-compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Derived : Base {
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect open class Base {
 ^
-compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Derived : Base {
 ^
-compiler/testData/multiplatform/classScopes/fakeOverrides/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual open class Base {
 ^
-compiler/testData/multiplatform/classScopes/fakeOverrides/jvm.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/fakeOverrides/jvm.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class Derived : Base() {
 ^

compiler/testData/multiplatform/classScopes/functionAndPropertyWithSameName/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/functionAndPropertyWithSameName/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/functionAndPropertyWithSameName/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/functionIncorrectSignature/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/functionIncorrectSignature/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/functionIncorrectSignature/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/functionIncorrectSignatureFromSuperclass/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/functionIncorrectSignatureFromSuperclass/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/functionIncorrectSignatureFromSuperclass/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/missingConstructor/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/missingConstructor/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/missingConstructor/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/missingFunction/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/missingFunction/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/missingFunction/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/classScopes/simple/output.txt

@@ -1,16 +1,16 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/simple/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/simple/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo(param: String) {
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/classScopes/simple/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/simple/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo(param: String) {
 ^
-compiler/testData/multiplatform/classScopes/simple/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/classScopes/simple/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class Foo actual constructor(param: String) {
 ^

compiler/testData/multiplatform/createImplClassInPlatformModule/output.txt

@@ -1,16 +1,16 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/createImplClassInPlatformModule/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/createImplClassInPlatformModule/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/createImplClassInPlatformModule/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/createImplClassInPlatformModule/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo
 ^
-compiler/testData/multiplatform/createImplClassInPlatformModule/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/createImplClassInPlatformModule/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class Foo(x: Int) {
 ^

compiler/testData/multiplatform/defaultArguments/methodDefaultArgsViaTypealias/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/defaultArguments/methodDefaultArgsViaTypealias/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/methodDefaultArgsViaTypealias/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class A(p: String = "constructor") {
 ^
 

compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/output.txt

@@ -1,35 +1,35 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C(x: Int, y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:7:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:7:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class Anno1(val x: Int, val y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:9:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:9:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class Anno2(val x: Int, val y: String = "OK")
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C(x: Int, y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:7:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:7:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class Anno1(val x: Int, val y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:9:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/common.kt:9:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class Anno2(val x: Int, val y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class C actual constructor(x: Int, y: String) {}
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:7:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:7:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual annotation class Anno1(actual val x: Int, actual val y: String = "OK")
 ^
-compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:9:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/defaultArguments/useDefaultArgumentsInDependency/jvm.kt:9:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual annotation class Anno2(actual val x: Int, actual val y: String)
 ^
 

compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/output.txt

@@ -1,25 +1,25 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect abstract class Base {
 ^
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class DerivedImplicit : Base {
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect abstract class Base {
 ^
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class DerivedImplicit : Base {
 ^
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual abstract class Base {
 ^
-compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/jvm.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/explicitActualOnOverrideOfAbstractMethod/jvm.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class DerivedImplicit : Base() {
 ^

compiler/testData/multiplatform/genericDeclarations/output.txt

@@ -1,16 +1,16 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/genericDeclarations/common.kt:9:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/genericDeclarations/common.kt:9:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C1<A>
 ^
-compiler/testData/multiplatform/genericDeclarations/common.kt:10:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/genericDeclarations/common.kt:10:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C2<B : C2<B>>
 ^
-compiler/testData/multiplatform/genericDeclarations/common.kt:11:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/genericDeclarations/common.kt:11:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C3<D, E : MutableList<in D>>
 ^
-compiler/testData/multiplatform/genericDeclarations/common.kt:13:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/genericDeclarations/common.kt:13:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect abstract class AbstractList<F> : MutableList<F>
 ^
 

compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNothing/output.txt

@@ -1,10 +1,10 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNothing/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNothing/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class E01
 ^
-compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNothing/common.kt:2:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNothing/common.kt:2:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class E02
 ^
 

compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNullableType/output.txt

@@ -1,10 +1,10 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNullableType/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNullableType/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class E01
 ^
-compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNullableType/common.kt:2:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/actualTypealiasToNullableType/common.kt:2:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class E02
 ^
 

compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/output.txt

@@ -1,17 +1,17 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class A
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class A
 ^
-compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/discriminateHeaderClassInFavorOfTypeAlias/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual typealias A = AImpl
 ^
 

compiler/testData/multiplatform/implTypeAlias/generic/output.txt

@@ -1,17 +1,17 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/generic/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/generic/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C1<A> {
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/generic/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/generic/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C1<A> {
 ^
-compiler/testData/multiplatform/implTypeAlias/generic/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/generic/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual typealias C1<A> = C1Impl<A>
 ^
 compiler/testData/multiplatform/implTypeAlias/generic/jvm.kt:3:13: warning: parameter 'a' is never used

compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/output.txt

@@ -1,22 +1,22 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class ByTypeAlias {
 ^
-compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:2:15: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:2:15: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     interface Nested
               ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class ByTypeAlias {
 ^
-compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:2:15: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/common.kt:2:15: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     interface Nested
               ^
-compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/jvm.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/implTypeAlias/nestedClassesViaTypeAlias/jvm.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual typealias ByTypeAlias = ByTypeAliasImpl
 ^

compiler/testData/multiplatform/incompatibleClasses/output.txt

@@ -1,55 +1,55 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/incompatibleClasses/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class PClass
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:2:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:2:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect interface PInterface
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect object PObject
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:4:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:4:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect enum class PEnumClass
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class PAnnotationClass
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:7:10: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:7:10: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 internal expect object InternalObject
          ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:8:8: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:8:8: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 public expect object PublicObject
        ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:10:6: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:10:6: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 open expect class OpenClass
      ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:11:10: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:11:10: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 abstract expect class AbstractClass
          ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:12:7: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:12:7: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 final expect class FinalClass
       ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:14:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:14:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C1<A>
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:15:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:15:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C2<B>
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:16:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:16:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C3<D, E : D>
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:18:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:18:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class C4<F>
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:21:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:21:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect abstract class ExtendsNumber : Number
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:23:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:23:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect fun interface FunInterface {
 ^
-compiler/testData/multiplatform/incompatibleClasses/common.kt:27:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleClasses/common.kt:27:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect fun interface FunInterface2 {
 ^
 

compiler/testData/multiplatform/incompatibleNestedClasses/output.txt

@@ -1,40 +1,40 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class O1 {
 ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:2:11: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:2:11: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     class N1
           ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:3:15: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:3:15: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     interface N2
               ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:4:12: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:4:12: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     object N3
            ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:7:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:7:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class O2 {
 ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:8:11: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:8:11: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     class N2
           ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:9:17: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:9:17: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     inner class I2
                 ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:12:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:12:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class O3 {
 ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:13:12: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:13:12: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     object Companion
            ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:14:22: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:14:22: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     companion object Factory
                      ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:17:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:17:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class O4 {
 ^
-compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:18:15: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incompatibleNestedClasses/common.kt:18:15: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
     companion object
               ^
 

compiler/testData/multiplatform/incorrectImplInClass/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/incorrectImplInClass/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/incorrectImplInClass/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo
 ^
 

compiler/testData/multiplatform/inlineClasses/output.txt

@@ -1,13 +1,13 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/inlineClasses/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/inlineClasses/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect inline class Foo1(val x: Int)
 ^
 compiler/testData/multiplatform/inlineClasses/common.kt:3:8: warning: 'inline' modifier is deprecated. Use 'value' instead
 expect inline class Foo1(val x: Int)
        ^
-compiler/testData/multiplatform/inlineClasses/common.kt:4:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/inlineClasses/common.kt:4:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect inline class Foo2(val y: String)
 ^
 compiler/testData/multiplatform/inlineClasses/common.kt:4:8: warning: 'inline' modifier is deprecated. Use 'value' instead

compiler/testData/multiplatform/jsNameClash/output.txt

@@ -1,16 +1,16 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/jsNameClash/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/jsNameClash/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class ClassWithImplByExtension
 ^
 
 -- JS --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/jsNameClash/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/jsNameClash/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class ClassWithImplByExtension
 ^
-compiler/testData/multiplatform/jsNameClash/js.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/jsNameClash/js.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class ClassWithImplByExtension
 ^

compiler/testData/multiplatform/missingOverload/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/missingOverload/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/missingOverload/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo {
 ^
 

compiler/testData/multiplatform/optionalExpectation/output.txt

@@ -1,23 +1,23 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class A()
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class A()
 ^
-compiler/testData/multiplatform/optionalExpectation/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/optionalExpectation/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual annotation class A
 ^
 
 -- JS --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/optionalExpectation/common.kt:5:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect annotation class A()
 ^

compiler/testData/multiplatform/regressions/incompatibleClassScopesWithImplTypeAlias/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/regressions/incompatibleClassScopesWithImplTypeAlias/common.kt:3:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/regressions/incompatibleClassScopesWithImplTypeAlias/common.kt:3:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect abstract class Writer protected constructor()
 ^
 

compiler/testData/multiplatform/simple/output.txt

@@ -1,26 +1,26 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/simple/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/simple/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Printer() {
 ^
 
 -- JVM --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/simple/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/simple/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Printer() {
 ^
-compiler/testData/multiplatform/simple/jvm.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/simple/jvm.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class Printer {
 ^
 
 -- JS --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/simple/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/simple/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Printer() {
 ^
-compiler/testData/multiplatform/simple/js.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/simple/js.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 actual class Printer {
 ^

compiler/testData/multiplatform/weakIncompatibilityWithoutActualModifier/output.txt

@@ -1,7 +1,7 @@
 -- Common --
 Exit code: OK
 Output:
-compiler/testData/multiplatform/weakIncompatibilityWithoutActualModifier/common.kt:1:1: warning: the expect/actual classes (including interfaces, objects, annotations, enums, actual typealiases) are an experimental feature. You can use -Xexpect-actual-classes flag to suppress this warning.
+compiler/testData/multiplatform/weakIncompatibilityWithoutActualModifier/common.kt:1:1: warning: 'expect'/'actual' classes (including interfaces, objects, annotations, enums, and 'actual' typealiases) are in Beta. You can use -Xexpect-actual-classes flag to suppress this warning. Also see: https://youtrack.jetbrains.com/issue/KT-61573
 expect class Foo
 ^