diff --git a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinClassMetadata.kt b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinClassMetadata.kt
index 98a8d9294c2..4601e305711 100644
--- a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinClassMetadata.kt
+++ b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinClassMetadata.kt
@@ -21,8 +21,8 @@ import kotlin.LazyThreadSafetyMode.PUBLICATION
 /**
  * Represents the parsed metadata of a Kotlin JVM class file.
  *
- * To create an instance of [KotlinClassMetadata], first obtain a [KotlinClassHeader] instance by loading the contents
- * of the [Metadata] annotation on a class file, and then call [KotlinClassMetadata.read].
+ * To create an instance of [KotlinClassMetadata], first obtain an instance of [Metadata] annotation on a class file, and then call [KotlinClassMetadata.read].
+ * [Metadata] annotation can be obtained either via reflection or created from data from a binary class file, using its constructor or helper function.
  */
 sealed class KotlinClassMetadata(val header: Metadata) {
     /**
@@ -46,7 +46,7 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          *
          * @param v the visitor that must visit this class
          */
-        @Deprecated(visitorApiMessage)
+        @Deprecated(VISITOR_API_MESSAGE)
         fun accept(v: KmClassVisitor) {
             val (strings, proto) = classData
             proto.accept(v, strings)
@@ -56,22 +56,20 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * A [KmClassVisitor] that generates the metadata of a Kotlin class.
          */
         @Deprecated(
-            writerApiMessage,
-            ReplaceWith("KotlinClassMetadata.writeClass(kmClass, metadataVersion, extraInt)"),
+            "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeClass(kmClass, metadataVersion, extraInt)",
         )
         class Writer : ClassWriter(JvmStringTable()) {
             /**
              * Returns the metadata of the class that was written with this writer.
              *
-             * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+             * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
              *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-             * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+             * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
              *   0 by default
              */
             @JvmOverloads
             @Deprecated(
-                writerApiMessage,
-                ReplaceWith("KotlinClassMetadata.writeClass(kmClass, metadataVersion, extraInt)"),
+                "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeClass(kmClass, metadataVersion, extraInt)",
             )
             fun write(
                 metadataVersion: IntArray = COMPATIBLE_METADATA_VERSION,
@@ -106,7 +104,7 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          *
          * @param v the visitor that must visit this file facade
          */
-        @Deprecated(visitorApiMessage)
+        @Deprecated(VISITOR_API_MESSAGE)
         fun accept(v: KmPackageVisitor) {
             val (strings, proto) = packageData
             proto.accept(v, strings)
@@ -116,22 +114,20 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * A [KmPackageVisitor] that generates the metadata of a Kotlin file facade.
          */
         @Deprecated(
-            visitorApiMessage,
-            ReplaceWith("KotlinClassMetadata.writeFileFacade(kmPackage, metadataVersion, extraInt)")
+            "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeFileFacade(kmPackage, metadataVersion, extraInt)",
         )
         class Writer : PackageWriter(JvmStringTable()) {
             /**
              * Returns the metadata of the file facade that was written with this writer.
              *
-             * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+             * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
              *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-             * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+             * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
              *   0 by default
              */
             @JvmOverloads
             @Deprecated(
-                visitorApiMessage,
-                ReplaceWith("KotlinClassMetadata.writeFileFacade(kmPackage, metadataVersion, extraInt)")
+                "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeFileFacade(kmPackage, metadataVersion, extraInt)",
             )
             fun write(
                 metadataVersion: IntArray = COMPATIBLE_METADATA_VERSION,
@@ -178,7 +174,7 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          *
          * @param v the visitor that must visit this lambda
          */
-        @Deprecated(visitorApiMessage)
+        @Deprecated(VISITOR_API_MESSAGE)
         fun accept(v: KmLambdaVisitor) {
             if (!isLambda) throw IllegalStateException(
                 "accept(KmLambdaVisitor) is only possible for synthetic classes which are lambdas (isLambda = true)"
@@ -194,20 +190,20 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * the resulting metadata will represent a _non-lambda_ synthetic class.
          */
         @Deprecated(
-            "Visitor API is deprecated as excessive and cumbersome. Please use KotlinClassMetadata.writeLambda(kmLambda, metadataVersion, extraInt) " +
+            WRITER_API_MESSAGE + ": KotlinClassMetadata.writeLambda(kmLambda, metadataVersion, extraInt) " +
                     "or KotlinClassMetadata.writeSyntheticClass(metadataVersion, extraInt) for a non-lambda synthetic class",
         )
         class Writer : LambdaWriter(JvmStringTable()) {
             /**
              * Returns the metadata of the synthetic class that was written with this writer.
              *
-             * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+             * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
              *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-             * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+             * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
              *   0 by default
              */
             @Deprecated(
-                "Visitor API is deprecated as excessive and cumbersome. Please use KotlinClassMetadata.writeLambda(kmLambda, metadataVersion, extraInt) " +
+                WRITER_API_MESSAGE + ": KotlinClassMetadata.writeLambda(kmLambda, metadataVersion, extraInt) " +
                         "or KotlinClassMetadata.writeSyntheticClass(metadataVersion, extraInt) for a non-lambda synthetic class",
             )
             @JvmOverloads
@@ -241,22 +237,20 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * A writer that generates the metadata of a multi-file class facade.
          */
         @Deprecated(
-            writerApiMessage,
-            ReplaceWith("KotlinClassMetadata.writeMultiFileClassFacade(partClassNames, metadataVersion, extraInt)"),
+            "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeMultiFileClassFacade(partClassNames, metadataVersion, extraInt)",
         )
         class Writer {
             /**
              * Returns the metadata of the multi-file class facade that was written with this writer.
              *
              * @param partClassNames JVM internal names of the part classes which this multi-file class combines
-             * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+             * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
              *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-             * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+             * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
              *   0 by default
              */
             @Deprecated(
-                writerApiMessage,
-                ReplaceWith("KotlinClassMetadata.writeMultiFileClassFacade(partClassNames, metadataVersion, extraInt)"),
+                "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeMultiFileClassFacade(partClassNames, metadataVersion, extraInt)",
             )
             @JvmOverloads
             fun write(
@@ -304,7 +298,7 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          *
          * @param v the visitor that must visit this multi-file class part
          */
-        @Deprecated(visitorApiMessage)
+        @Deprecated(VISITOR_API_MESSAGE)
         fun accept(v: KmPackageVisitor) {
             val (strings, proto) = packageData
             proto.accept(v, strings)
@@ -314,22 +308,20 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * A [KmPackageVisitor] that generates the metadata of a multi-file class part.
          */
         @Deprecated(
-            writerApiMessage,
-            ReplaceWith("KotlinClassMetadata.writeMultiFileClassPart(kmPackage, facadeClassName, metadataVersion, extraInt)")
+            "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeMultiFileClassPart(kmPackage, facadeClassName, metadataVersion, extraInt)"
         )
         class Writer : PackageWriter(JvmStringTable()) {
             /**
              * Returns the metadata of the multi-file class part that was written with this writer.
              *
              * @param facadeClassName JVM internal name of the corresponding multi-file class facade
-             * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+             * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
              *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-             * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+             * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
              *   0 by default
              */
             @Deprecated(
-                writerApiMessage,
-                ReplaceWith("KotlinClassMetadata.writeMultiFileClassPart(kmPackage, facadeClassName, metadataVersion, extraInt)")
+                "$WRITER_API_MESSAGE, such as KotlinClassMetadata.writeMultiFileClassPart(kmPackage, facadeClassName, metadataVersion, extraInt)"
             )
             @JvmOverloads
             fun write(
@@ -357,9 +349,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
         /**
          * Writes contents of [kmClass] as the class metadata.
          *
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeClass(
@@ -371,9 +363,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
         /**
          * Writes [kmPackage] contents as the file facade metadata.
          *
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeFileFacade(
@@ -385,9 +377,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
         /**
          * Writes [kmLambda] as the synthetic class metadata.
          *
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeLambda(
@@ -399,9 +391,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
         /**
          * Writes synthetic class metadata.
          *
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeSyntheticClass(
@@ -413,9 +405,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * Writes metadata of the multi-file class facade.
          *
          * @param partClassNames JVM internal names of the part classes which this multi-file class combines
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeMultiFileClassFacade(
@@ -427,9 +419,9 @@ sealed class KotlinClassMetadata(val header: Metadata) {
          * Writes the metadata of the multi-file class part.
          *
          * @param facadeClassName JVM internal name of the corresponding multi-file class facade
-         * @param metadataVersion metadata version to be written to the metadata (see [KotlinClassHeader.metadataVersion]),
+         * @param metadataVersion metadata version to be written to the metadata (see [Metadata.metadataVersion]),
          *   [KotlinClassMetadata.COMPATIBLE_METADATA_VERSION] by default. Cannot be less (lexicographically) than `[1, 4]`
-         * @param extraInt the value of the class-level flags to be written to the metadata (see [KotlinClassHeader.extraInt]),
+         * @param extraInt the value of the class-level flags to be written to the metadata (see [Metadata.extraInt]),
          *   0 by default
          */
         fun writeMultiFileClassPart(
@@ -531,8 +523,8 @@ sealed class KotlinClassMetadata(val header: Metadata) {
     }
 }
 
-internal const val visitorApiMessage =
+internal const val VISITOR_API_MESSAGE =
     "Visitor API is deprecated as excessive and cumbersome. Please use nodes (such as KmClass) and their properties."
 
-internal const val writerApiMessage =
-    "Visitor API is deprecated as excessive and cumbersome. Please use companion functions on KotlinClassMetadata, such as KotlinClassMetadata.writeClass."
\ No newline at end of file
+internal const val WRITER_API_MESSAGE =
+    "Visitor Writer API is deprecated as excessive and cumbersome. Please use member functions of KotlinClassMetadata.Companion"
\ No newline at end of file
diff --git a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinModuleMetadata.kt b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinModuleMetadata.kt
index 5daa709b145..ed860ebdad2 100644
--- a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinModuleMetadata.kt
+++ b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/KotlinModuleMetadata.kt
@@ -93,7 +93,7 @@ class KotlinModuleMetadata(@Suppress("CanBeParameter", "MemberVisibilityCanBePri
      *
      * @param v the visitor that must visit this module file
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(v: KmModuleVisitor) {
         for ((fqName, parts) in data.packageFqName2Parts) {
             val (fileFacades, multiFileClassParts) = parts.parts.partition { parts.getMultifileFacadeName(it) == null }
@@ -150,7 +150,7 @@ class KotlinModuleMetadata(@Suppress("CanBeParameter", "MemberVisibilityCanBePri
  *
  * When using this class, [visitEnd] must be called exactly once and after calls to all other visit* methods.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 abstract class KmModuleVisitor(private val delegate: KmModuleVisitor? = null) {
     /**
      * Visits the table of all single- and multi-file facades declared in some package of this module.
@@ -220,17 +220,17 @@ class KmModule : KmModuleVisitor() {
      */
     val optionalAnnotationClasses: MutableList<KmClass> = ArrayList(0)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitPackageParts(fqName: String, fileFacades: List<String>, multiFileClassParts: Map<String, String>) {
         packageParts[fqName] = KmPackageParts(fileFacades.toMutableList(), multiFileClassParts.toMutableMap())
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitAnnotation(annotation: KmAnnotation) {
         annotations.add(annotation)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitOptionalAnnotationClass(): KmClass =
         KmClass().also(optionalAnnotationClasses::add)
 
@@ -239,7 +239,7 @@ class KmModule : KmModuleVisitor() {
      *
      * @param visitor the visitor which will visit data in this module.
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmModuleVisitor) {
         for ((fqName, parts) in packageParts) {
             visitor.visitPackageParts(fqName, parts.fileFacades, parts.multiFileClassParts)
diff --git a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/impl/JvmMetadataExtensions.kt b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/impl/JvmMetadataExtensions.kt
index 2d554b6c5de..637a38805b2 100644
--- a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/impl/JvmMetadataExtensions.kt
+++ b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/impl/JvmMetadataExtensions.kt
@@ -14,7 +14,7 @@ import org.jetbrains.kotlin.metadata.deserialization.getExtensionOrNull
 import org.jetbrains.kotlin.metadata.jvm.JvmProtoBuf
 import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
 
-@Suppress("DEPRECATION", "DEPRECATION_ERROR")
+@Suppress("DEPRECATION")
 internal class JvmMetadataExtensions : MetadataExtensions {
     override fun readClassExtensions(v: KmClassVisitor, proto: ProtoBuf.Class, c: ReadContext) {
         val ext = v.visitExtensions(JvmClassExtensionVisitor.TYPE) as? JvmClassExtensionVisitor ?: return
diff --git a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/jvmExtensionVisitors.kt b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/jvmExtensionVisitors.kt
index 5d306a109c9..42e4e0294bc 100644
--- a/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/jvmExtensionVisitors.kt
+++ b/libraries/kotlinx-metadata/jvm/src/kotlinx/metadata/jvm/jvmExtensionVisitors.kt
@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
 /**
  * A visitor containing the common code to visit JVM extensions for Kotlin declaration containers, such as classes and package fragments.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 abstract class JvmDeclarationContainerExtensionVisitor @JvmOverloads constructor(
     protected open val delegate: JvmDeclarationContainerExtensionVisitor? = null
 ) : KmDeclarationContainerExtensionVisitor {
@@ -46,7 +46,7 @@ abstract class JvmDeclarationContainerExtensionVisitor @JvmOverloads constructor
 /**
  * A visitor to visit JVM extensions for a class.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmClassExtensionVisitor @JvmOverloads constructor(
     delegate: JvmClassExtensionVisitor? = null
 ) : KmClassExtensionVisitor, JvmDeclarationContainerExtensionVisitor(delegate) {
@@ -92,7 +92,7 @@ open class JvmClassExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a package fragment.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmPackageExtensionVisitor @JvmOverloads constructor(
     delegate: JvmPackageExtensionVisitor? = null
 ) : KmPackageExtensionVisitor, JvmDeclarationContainerExtensionVisitor(delegate) {
@@ -123,7 +123,7 @@ open class JvmPackageExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a function.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmFunctionExtensionVisitor @JvmOverloads constructor(
     private val delegate: JvmFunctionExtensionVisitor? = null
 ) : KmFunctionExtensionVisitor {
@@ -170,7 +170,7 @@ open class JvmFunctionExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a property.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmPropertyExtensionVisitor @JvmOverloads constructor(
     private val delegate: JvmPropertyExtensionVisitor? = null
 ) : KmPropertyExtensionVisitor {
@@ -259,7 +259,7 @@ open class JvmPropertyExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a constructor.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmConstructorExtensionVisitor @JvmOverloads constructor(
     private val delegate: JvmConstructorExtensionVisitor? = null
 ) : KmConstructorExtensionVisitor {
@@ -291,7 +291,7 @@ open class JvmConstructorExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a type parameter.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmTypeParameterExtensionVisitor @JvmOverloads constructor(
     private val delegate: JvmTypeParameterExtensionVisitor? = null
 ) : KmTypeParameterExtensionVisitor {
@@ -328,7 +328,7 @@ open class JvmTypeParameterExtensionVisitor @JvmOverloads constructor(
 /**
  * A visitor to visit JVM extensions for a type.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 open class JvmTypeExtensionVisitor @JvmOverloads constructor(
     private val delegate: JvmTypeExtensionVisitor? = null
 ) : KmTypeExtensionVisitor {
diff --git a/libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/MetadataSmokeTest.kt b/libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/MetadataSmokeTest.kt
index 7f9b463c617..827a4242622 100644
--- a/libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/MetadataSmokeTest.kt
+++ b/libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/MetadataSmokeTest.kt
@@ -191,7 +191,6 @@ class MetadataSmokeTest {
     }
 
     @Test
-    @Suppress("DEPRECATION_ERROR")
     fun metadataVersionEarlierThan1_4() {
         val dummy = (KotlinClassMetadata.read(MetadataSmokeTest::class.java.readMetadata()) as KotlinClassMetadata.Class).toKmClass()
         val mv = intArrayOf(1, 3)
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/extensions.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/extensions.kt
index ec9f1a74604..bc8af0b91fe 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/extensions.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/extensions.kt
@@ -43,7 +43,7 @@ class KmExtensionType(private val klass: KClass<out KmExtensionVisitor>) {
 /**
  * A base interface for all extension visitors.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmExtensionVisitor {
     /**
      * Type of this extension visitor.
@@ -54,65 +54,65 @@ interface KmExtensionVisitor {
 /**
  * A visitor to visit platform-specific extensions for a declaration container, such as a class or a package fragment.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmDeclarationContainerExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a class.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmClassExtensionVisitor : KmDeclarationContainerExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a package fragment.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmPackageExtensionVisitor : KmDeclarationContainerExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a module fragment.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmModuleFragmentExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a function.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmFunctionExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a property.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmPropertyExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a constructor.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmConstructorExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a type parameter.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmTypeParameterExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a type.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmTypeExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a type alias.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmTypeAliasExtensionVisitor : KmExtensionVisitor
 
 /**
  * A visitor to visit platform-specific extensions for a value parameter.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 interface KmValueParameterExtensionVisitor : KmExtensionVisitor
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/extensions/MetadataExtensions.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/extensions/MetadataExtensions.kt
index 2972defe38a..c689a08579f 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/extensions/MetadataExtensions.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/extensions/MetadataExtensions.kt
@@ -11,8 +11,7 @@ import kotlinx.metadata.impl.WriteContext
 import org.jetbrains.kotlin.metadata.ProtoBuf
 import java.util.*
 
-// TODO: this intrerface should be marked with @InternalAPI or something
-@Suppress("DEPRECATION", "DEPRECATION_ERROR")
+@Suppress("DEPRECATION")
 interface MetadataExtensions {
     fun readClassExtensions(v: KmClassVisitor, proto: ProtoBuf.Class, c: ReadContext)
 
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readers.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readers.kt
index 949a6335eaa..81bbc4c353d 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readers.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readers.kt
@@ -48,7 +48,6 @@ class ReadContext(
         }
 }
 
-@Deprecated(visitorApiMessage)
 @OptIn(ExperimentalContextReceivers::class)
 fun ProtoBuf.Class.accept(
     v: KmClassVisitor,
@@ -131,7 +130,6 @@ private fun ProtoBuf.Class.loadInlineClassUnderlyingType(c: ReadContext): ProtoB
         ?.returnType(c.types)
 }
 
-@Deprecated(visitorApiMessage)
 fun ProtoBuf.Package.accept(
     v: KmPackageVisitor,
     strings: NameResolver,
@@ -153,7 +151,6 @@ fun ProtoBuf.Package.accept(
     v.visitEnd()
 }
 
-@Deprecated(visitorApiMessage)
 fun ProtoBuf.PackageFragment.accept(
     v: KmModuleFragmentVisitor,
     strings: NameResolver,
@@ -200,7 +197,6 @@ private fun KmDeclarationContainerVisitor.visitDeclarations(
     }
 }
 
-@Deprecated(visitorApiMessage)
 fun ProtoBuf.Function.accept(v: KmLambdaVisitor, strings: NameResolver) {
     val c = ReadContext(strings, TypeTable(typeTable), VersionRequirementTable.EMPTY)
 
@@ -209,7 +205,6 @@ fun ProtoBuf.Function.accept(v: KmLambdaVisitor, strings: NameResolver) {
     v.visitEnd()
 }
 
-@Deprecated(visitorApiMessage)
 private fun ProtoBuf.Constructor.accept(v: KmConstructorVisitor, c: ReadContext) {
     for (parameter in valueParameterList) {
         v.visitValueParameter(parameter.flags, c[parameter.name])?.let { parameter.accept(it, c) }
@@ -266,7 +261,6 @@ private fun ProtoBuf.Function.accept(v: KmFunctionVisitor, outer: ReadContext) {
 }
 
 @OptIn(ExperimentalContextReceivers::class)
-@Deprecated(visitorApiMessage)
 fun ProtoBuf.Property.accept(v: KmPropertyVisitor, outer: ReadContext) {
     val c = outer.withTypeParameters(typeParameterList)
 
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writers.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writers.kt
index 09abf447ed7..9a998aa7fbc 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writers.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writers.kt
@@ -189,7 +189,6 @@ private fun writeFunction(c: WriteContext, flags: Flags, name: String, output: (
         }
     }
 
-@Deprecated(visitorApiMessage)
 fun writeProperty(
     c: WriteContext, flags: Flags, name: String, getterFlags: Flags, setterFlags: Flags, output: (ProtoBuf.Property.Builder) -> Unit
 ): KmPropertyVisitor = object : KmPropertyVisitor() {
@@ -423,7 +422,6 @@ private fun writeEffectExpression(c: WriteContext, output: (ProtoBuf.Expression.
         }
     }
 
-@Deprecated(visitorApiMessage)
 open class ClassWriter(stringTable: StringTable, contextExtensions: List<WriteContextExtension> = emptyList()) : KmClassVisitor() {
     protected val t = ProtoBuf.Class.newBuilder()!!
     protected val c: WriteContext = WriteContext(stringTable, contextExtensions)
@@ -497,7 +495,6 @@ open class ClassWriter(stringTable: StringTable, contextExtensions: List<WriteCo
     }
 }
 
-@Deprecated(visitorApiMessage)
 open class PackageWriter(stringTable: StringTable, contextExtensions: List<WriteContextExtension> = emptyList()) : KmPackageVisitor() {
     protected val t = ProtoBuf.Package.newBuilder()!!
     protected val c: WriteContext = WriteContext(stringTable, contextExtensions)
@@ -523,7 +520,6 @@ open class PackageWriter(stringTable: StringTable, contextExtensions: List<Write
     }
 }
 
-@Deprecated(visitorApiMessage)
 open class ModuleFragmentWriter(stringTable: StringTable, contextExtensions: List<WriteContextExtension> = emptyList()) :
     KmModuleFragmentVisitor() {
     protected val t = ProtoBuf.PackageFragment.newBuilder()!!
@@ -549,7 +545,6 @@ open class ModuleFragmentWriter(stringTable: StringTable, contextExtensions: Lis
         }
 }
 
-@Deprecated(visitorApiMessage)
 open class LambdaWriter(stringTable: StringTable) : KmLambdaVisitor() {
     protected var t: ProtoBuf.Function.Builder? = null
     protected val c = WriteContext(stringTable)
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/internal/common/KotlinCommonMetadata.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/internal/common/KotlinCommonMetadata.kt
index 6a47136dfbe..8d78b0283d1 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/internal/common/KotlinCommonMetadata.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/internal/common/KotlinCommonMetadata.kt
@@ -14,7 +14,7 @@ import org.jetbrains.kotlin.metadata.builtins.readBuiltinsPackageFragment
 import org.jetbrains.kotlin.metadata.deserialization.NameResolverImpl
 import java.io.ByteArrayInputStream
 
-// TODO: decide what to with this piece
+// TODO: stabilize
 class KotlinCommonMetadata private constructor(private val proto: ProtoBuf.PackageFragment) {
     fun toKmModuleFragment(): KmModuleFragment =
         KmModuleFragment().apply(this::accept)
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/nodes.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/nodes.kt
index d1d0a8b0498..30b385b333c 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/nodes.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/nodes.kt
@@ -119,75 +119,75 @@ class KmClass : KmClassVisitor(), KmDeclarationContainer {
     private val extensions: List<KmClassExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createClassExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visit(flags: Flags, name: ClassName) {
         this.flags = flags
         this.name = name
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeParameter(flags: Flags, name: String, id: Int, variance: KmVariance): KmTypeParameterVisitor =
         KmTypeParameter(flags, name, id, variance).addTo(typeParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitSupertype(flags: Flags): KmTypeVisitor =
         KmType(flags).addTo(supertypes)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitFunction(flags: Flags, name: String): KmFunctionVisitor =
         KmFunction(flags, name).addTo(functions)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitProperty(flags: Flags, name: String, getterFlags: Flags, setterFlags: Flags): KmPropertyVisitor =
         KmProperty(flags, name, getterFlags, setterFlags).addTo(properties)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeAlias(flags: Flags, name: String): KmTypeAliasVisitor =
         KmTypeAlias(flags, name).addTo(typeAliases)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitConstructor(flags: Flags): KmConstructorVisitor =
         KmConstructor(flags).addTo(constructors)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitCompanionObject(name: String) {
         this.companionObject = name
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitNestedClass(name: String) {
         nestedClasses.add(name)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitEnumEntry(name: String) {
         enumEntries.add(name)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitSealedSubclass(name: ClassName) {
         sealedSubclasses.add(name)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitInlineClassUnderlyingPropertyName(name: String) {
         inlineClassUnderlyingPropertyName = name
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitInlineClassUnderlyingType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { inlineClassUnderlyingType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     @ExperimentalContextReceivers
     override fun visitContextReceiverType(flags: Flags): KmTypeVisitor =
         KmType(flags).addTo(contextReceiverTypes)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersionRequirement(): KmVersionRequirementVisitor =
         KmVersionRequirement().addTo(versionRequirements)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmClassExtensionVisitor =
         extensions.singleOfType(type)
 
@@ -196,7 +196,7 @@ class KmClass : KmClassVisitor(), KmDeclarationContainer {
      *
      * @param visitor the visitor which will visit data in this class
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     @OptIn(ExperimentalContextReceivers::class)
     fun accept(visitor: KmClassVisitor) {
         visitor.visit(flags, name)
@@ -242,19 +242,19 @@ class KmPackage : KmPackageVisitor(), KmDeclarationContainer {
     private val extensions: List<KmPackageExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createPackageExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitFunction(flags: Flags, name: String): KmFunctionVisitor =
         KmFunction(flags, name).addTo(functions)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitProperty(flags: Flags, name: String, getterFlags: Flags, setterFlags: Flags): KmPropertyVisitor =
         KmProperty(flags, name, getterFlags, setterFlags).addTo(properties)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeAlias(flags: Flags, name: String): KmTypeAliasVisitor =
         KmTypeAlias(flags, name).addTo(typeAliases)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmPackageExtensionVisitor =
         extensions.singleOfType(type)
 
@@ -263,7 +263,7 @@ class KmPackage : KmPackageVisitor(), KmDeclarationContainer {
      *
      * @param visitor the visitor which will visit data in this package fragment
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmPackageVisitor) {
         functions.forEach { visitor.visitFunction(it.flags, it.name)?.let(it::accept) }
         properties.forEach { visitor.visitProperty(it.flags, it.name, it.getterFlags, it.setterFlags)?.let(it::accept) }
@@ -292,15 +292,15 @@ class KmModuleFragment : KmModuleFragmentVisitor() {
     private val extensions: List<KmModuleFragmentExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createModuleFragmentExtensions)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitPackage(): KmPackageVisitor? =
         KmPackage().also { pkg = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmModuleFragmentExtensionVisitor? =
         extensions.singleOfType(type)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitClass(): KmClassVisitor? =
         KmClass().addTo(classes)
 
@@ -309,7 +309,7 @@ class KmModuleFragment : KmModuleFragmentVisitor() {
      *
      * @param visitor the visitor which will visit data in the module fragment.
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmModuleFragmentVisitor) {
         pkg?.let { visitor.visitPackage()?.let(it::accept) }
         classes.forEach { visitor.visitClass()?.let(it::accept) }
@@ -328,7 +328,7 @@ class KmLambda : KmLambdaVisitor() {
      */
     lateinit var function: KmFunction
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitFunction(flags: Flags, name: String): KmFunctionVisitor =
         KmFunction(flags, name).also { function = it }
 
@@ -337,7 +337,7 @@ class KmLambda : KmLambdaVisitor() {
      *
      * @param visitor the visitor which will visit data in this lambda
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmLambdaVisitor) {
         visitor.visitFunction(function.flags, function.name)?.let(function::accept)
         visitor.visitEnd()
@@ -364,15 +364,15 @@ class KmConstructor(var flags: Flags) : KmConstructorVisitor() {
     private val extensions: List<KmConstructorExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createConstructorExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitValueParameter(flags: Flags, name: String): KmValueParameterVisitor =
         KmValueParameter(flags, name).addTo(valueParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersionRequirement(): KmVersionRequirementVisitor =
         KmVersionRequirement().addTo(versionRequirements)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmConstructorExtensionVisitor =
         extensions.singleOfType(type)
 
@@ -381,7 +381,7 @@ class KmConstructor(var flags: Flags) : KmConstructorVisitor() {
      *
      * @param visitor the visitor which will visit data in this class
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmConstructorVisitor) {
         valueParameters.forEach { visitor.visitValueParameter(it.flags, it.name)?.let(it::accept) }
         versionRequirements.forEach { visitor.visitVersionRequirement()?.let(it::accept) }
@@ -441,37 +441,37 @@ class KmFunction(
     private val extensions: List<KmFunctionExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createFunctionExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeParameter(flags: Flags, name: String, id: Int, variance: KmVariance): KmTypeParameterVisitor =
         KmTypeParameter(flags, name, id, variance).addTo(typeParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitReceiverParameterType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { receiverParameterType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     @ExperimentalContextReceivers
     override fun visitContextReceiverType(flags: Flags): KmTypeVisitor =
         KmType(flags).addTo(contextReceiverTypes)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitValueParameter(flags: Flags, name: String): KmValueParameterVisitor =
         KmValueParameter(flags, name).addTo(valueParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitReturnType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { returnType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersionRequirement(): KmVersionRequirementVisitor =
         KmVersionRequirement().addTo(versionRequirements)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     @ExperimentalContracts
     override fun visitContract(): KmContractVisitor =
         KmContract().also { contract = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmFunctionExtensionVisitor =
         extensions.singleOfType(type)
 
@@ -481,7 +481,7 @@ class KmFunction(
      * @param visitor the visitor which will visit data in this function
      */
     @OptIn(ExperimentalContextReceivers::class)
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmFunctionVisitor) {
         typeParameters.forEach { visitor.visitTypeParameter(it.flags, it.name, it.id, it.variance)?.let(it::accept) }
         receiverParameterType?.let { visitor.visitReceiverParameterType(it.flags)?.let(it::accept) }
@@ -546,32 +546,32 @@ class KmProperty(
     private val extensions: List<KmPropertyExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createPropertyExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeParameter(flags: Flags, name: String, id: Int, variance: KmVariance): KmTypeParameterVisitor =
         KmTypeParameter(flags, name, id, variance).addTo(typeParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitReceiverParameterType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { receiverParameterType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     @ExperimentalContextReceivers
     override fun visitContextReceiverType(flags: Flags): KmTypeVisitor =
         KmType(flags).addTo(contextReceiverTypes)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitSetterParameter(flags: Flags, name: String): KmValueParameterVisitor =
         KmValueParameter(flags, name).also { setterParameter = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitReturnType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { returnType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersionRequirement(): KmVersionRequirementVisitor =
         KmVersionRequirement().addTo(versionRequirements)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmPropertyExtensionVisitor =
         extensions.singleOfType(type)
 
@@ -581,7 +581,7 @@ class KmProperty(
      * @param visitor the visitor which will visit data in this property
      */
     @OptIn(ExperimentalContextReceivers::class)
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmPropertyVisitor) {
         typeParameters.forEach { visitor.visitTypeParameter(it.flags, it.name, it.id, it.variance)?.let(it::accept) }
         receiverParameterType?.let { visitor.visitReceiverParameterType(it.flags)?.let(it::accept) }
@@ -634,28 +634,28 @@ class KmTypeAlias(
     private val extensions: List<KmTypeAliasExtension> =
         MetadataExtensions.INSTANCES.mapNotNull(MetadataExtensions::createTypeAliasExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeParameter(flags: Flags, name: String, id: Int, variance: KmVariance): KmTypeParameterVisitor =
         KmTypeParameter(flags, name, id, variance).addTo(typeParameters)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitUnderlyingType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { underlyingType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExpandedType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { expandedType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitAnnotation(annotation: KmAnnotation) {
         annotations.add(annotation)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmTypeAliasExtensionVisitor? =
         extensions.singleOfType(type)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersionRequirement(): KmVersionRequirementVisitor =
         KmVersionRequirement().addTo(versionRequirements)
 
@@ -664,7 +664,7 @@ class KmTypeAlias(
      *
      * @param visitor the visitor which will visit data in this type alias
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmTypeAliasVisitor) {
         typeParameters.forEach { visitor.visitTypeParameter(it.flags, it.name, it.id, it.variance)?.let(it::accept) }
         visitor.visitUnderlyingType(underlyingType.flags)?.let(underlyingType::accept)
@@ -701,15 +701,15 @@ class KmValueParameter(
     private val extensions: List<KmValueParameterExtension> =
         MetadataExtensions.INSTANCES.mapNotNull(MetadataExtensions::createValueParameterExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { type = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVarargElementType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { varargElementType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmValueParameterExtensionVisitor? =
         extensions.singleOfType(type)
 
@@ -718,7 +718,7 @@ class KmValueParameter(
      *
      * @param visitor the visitor which will visit data in this value parameter
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmValueParameterVisitor) {
         visitor.visitType(type.flags)?.let(type::accept)
         varargElementType?.let { visitor.visitVarargElementType(it.flags)?.let(it::accept) }
@@ -751,11 +751,11 @@ class KmTypeParameter(
     private val extensions: List<KmTypeParameterExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createTypeParameterExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitUpperBound(flags: Flags): KmTypeVisitor =
         KmType(flags).addTo(upperBounds)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmTypeParameterExtensionVisitor? =
         extensions.singleOfType(type)
 
@@ -764,7 +764,7 @@ class KmTypeParameter(
      *
      * @param visitor the visitor which will visit data in this type parameter
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmTypeParameterVisitor) {
         upperBounds.forEach { visitor.visitUpperBound(it.flags)?.let(it::accept) }
         extensions.forEach { visitor.visitExtensions(it.type)?.let(it::accept) }
@@ -822,43 +822,43 @@ class KmType(var flags: Flags) : KmTypeVisitor() {
     private val extensions: List<KmTypeExtension> =
         MetadataExtensions.INSTANCES.map(MetadataExtensions::createTypeExtension)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitClass(name: ClassName) {
         classifier = KmClassifier.Class(name)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeAlias(name: ClassName) {
         classifier = KmClassifier.TypeAlias(name)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitTypeParameter(id: Int) {
         classifier = KmClassifier.TypeParameter(id)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitArgument(flags: Flags, variance: KmVariance): KmTypeVisitor =
         KmType(flags).also { arguments.add(KmTypeProjection(variance, it)) }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitStarProjection() {
         arguments.add(KmTypeProjection.STAR)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitAbbreviatedType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { abbreviatedType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitOuterType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { outerType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitFlexibleTypeUpperBound(flags: Flags, typeFlexibilityId: String?): KmTypeVisitor =
         KmType(flags).also { flexibleTypeUpperBound = KmFlexibleTypeUpperBound(it, typeFlexibilityId) }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitExtensions(type: KmExtensionType): KmTypeExtension =
         extensions.singleOfType(type)
 
@@ -867,7 +867,7 @@ class KmType(var flags: Flags) : KmTypeVisitor() {
      *
      * @param visitor the visitor which will visit data in this type
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmTypeVisitor) {
         when (val classifier = classifier) {
             is KmClassifier.Class -> visitor.visitClass(classifier.name)
@@ -924,7 +924,7 @@ class KmVersionRequirement : KmVersionRequirementVisitor() {
      */
     lateinit var version: KmVersion
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visit(kind: KmVersionRequirementVersionKind, level: KmVersionRequirementLevel, errorCode: Int?, message: String?) {
         this.kind = kind
         this.level = level
@@ -932,7 +932,7 @@ class KmVersionRequirement : KmVersionRequirementVisitor() {
         this.message = message
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitVersion(major: Int, minor: Int, patch: Int) {
         this.version = KmVersion(major, minor, patch)
     }
@@ -942,7 +942,7 @@ class KmVersionRequirement : KmVersionRequirementVisitor() {
      *
      * @param visitor the visitor which will visit data in this version requirement
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmVersionRequirementVisitor) {
         visitor.visit(kind, level, errorCode, message)
         visitor.visitVersion(version.major, version.minor, version.patch)
@@ -964,7 +964,7 @@ class KmContract : KmContractVisitor() {
      */
     val effects: MutableList<KmEffect> = ArrayList(1)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitEffect(type: KmEffectType, invocationKind: KmEffectInvocationKind?): KmEffectVisitor =
         KmEffect(type, invocationKind).addTo(effects)
 
@@ -973,7 +973,7 @@ class KmContract : KmContractVisitor() {
      *
      * @param visitor the visitor which will visit data in this contract
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmContractVisitor) {
         effects.forEach { visitor.visitEffect(it.type, it.invocationKind)?.let(it::accept) }
         visitor.visitEnd()
@@ -1007,11 +1007,11 @@ class KmEffect(
      */
     var conclusion: KmEffectExpression? = null
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitConstructorArgument(): KmEffectExpressionVisitor =
         KmEffectExpression().addTo(constructorArguments)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitConclusionOfConditionalEffect(): KmEffectExpressionVisitor =
         KmEffectExpression().also { conclusion = it }
 
@@ -1020,7 +1020,7 @@ class KmEffect(
      *
      * @param visitor the visitor which will visit data in this effect
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmEffectVisitor) {
         constructorArguments.forEach { visitor.visitConstructorArgument()?.let(it::accept) }
         conclusion?.let { visitor.visitConclusionOfConditionalEffect()?.let(it::accept) }
@@ -1070,26 +1070,26 @@ class  KmEffectExpression : KmEffectExpressionVisitor() {
      */
     val orArguments: MutableList<KmEffectExpression> = ArrayList(0)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visit(flags: Flags, parameterIndex: Int?) {
         this.flags = flags
         this.parameterIndex = parameterIndex
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitConstantValue(value: Any?) {
         constantValue = KmConstantValue(value)
     }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitIsInstanceType(flags: Flags): KmTypeVisitor =
         KmType(flags).also { isInstanceType = it }
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitAndArgument(): KmEffectExpressionVisitor =
         KmEffectExpression().addTo(andArguments)
 
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     override fun visitOrArgument(): KmEffectExpressionVisitor =
         KmEffectExpression().addTo(orArguments)
 
@@ -1098,7 +1098,7 @@ class  KmEffectExpression : KmEffectExpressionVisitor() {
      *
      * @param visitor the visitor which will visit data in this effect expression
      */
-    @Deprecated(visitorApiMessage)
+    @Deprecated(VISITOR_API_MESSAGE)
     fun accept(visitor: KmEffectExpressionVisitor) {
         visitor.visit(flags, parameterIndex)
         constantValue?.let { visitor.visitConstantValue(it.value) }
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/util.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/util.kt
deleted file mode 100644
index 82bc32682ea..00000000000
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/util.kt
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-@file:Suppress("unused")
-
-package kotlinx.metadata
-
-/**
- * Assigns the contents of [collection] into this list. After this function completes, the list and [collection]
- * will have the same size and will consist of the same elements in the same order.
- *
- * Useful for rewriting contents of any repeated Km* element represented by a [MutableList], e.g.:
- *
- *     val klass: KmClass
- *     klass.functions.assignFrom(...)
- *
- */
-internal fun <T> MutableList<T>.assignFrom(collection: Collection<T>) {
-    clear()
-    addAll(collection)
-}
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/visitors.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/visitors.kt
index e8d2983cf1b..72cb38ea847 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/visitors.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/visitors.kt
@@ -7,13 +7,13 @@ package kotlinx.metadata
 
 import kotlin.contracts.ExperimentalContracts
 
-internal const val visitorApiMessage =
+internal const val VISITOR_API_MESSAGE =
     "Visitor API is deprecated as excessive and cumbersome. Please use nodes (such as KmClass) and their properties."
 
 /**
  * A visitor containing the common code to visit Kotlin declaration containers, such as classes and package fragments.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmDeclarationContainerVisitor @JvmOverloads constructor(protected open val delegate: KmDeclarationContainerVisitor? = null) {
     /**
@@ -61,7 +61,7 @@ abstract class KmDeclarationContainerVisitor @JvmOverloads constructor(protected
  * When using this class, [visit] must be called first, followed by zero or more [visitTypeParameter] calls, followed by zero or more calls
  * to other visit* methods, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmClassVisitor @JvmOverloads constructor(delegate: KmClassVisitor? = null) : KmDeclarationContainerVisitor(delegate) {
     override val delegate: KmClassVisitor?
@@ -194,7 +194,7 @@ abstract class KmClassVisitor @JvmOverloads constructor(delegate: KmClassVisitor
  *
  * When using this class, [visitEnd] must be called exactly once and after calls to all other visit* methods.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmPackageVisitor @JvmOverloads constructor(delegate: KmPackageVisitor? = null) : KmDeclarationContainerVisitor(delegate) {
     override val delegate: KmPackageVisitor?
@@ -222,7 +222,7 @@ abstract class KmPackageVisitor @JvmOverloads constructor(delegate: KmPackageVis
  *
  * When using this class, [visitEnd] must be called exactly once and after calls to all other visit* methods.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmModuleFragmentVisitor @JvmOverloads constructor(private val delegate: KmModuleFragmentVisitor? = null) {
 
@@ -259,7 +259,7 @@ abstract class KmModuleFragmentVisitor @JvmOverloads constructor(private val del
  *
  * When using this class, [visitFunction] must be called first, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmLambdaVisitor @JvmOverloads constructor(private val delegate: KmLambdaVisitor? = null) {
     /**
@@ -284,7 +284,7 @@ abstract class KmLambdaVisitor @JvmOverloads constructor(private val delegate: K
  *
  * When using this class, [visitEnd] must be called exactly once and after calls to all other visit* methods.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmConstructorVisitor @JvmOverloads constructor(private val delegate: KmConstructorVisitor? = null) {
     /**
@@ -324,7 +324,7 @@ abstract class KmConstructorVisitor @JvmOverloads constructor(private val delega
  * When using this class, zero or more calls to [visitTypeParameter] must be done first, followed by zero or more calls
  * to other visit* methods, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmFunctionVisitor @JvmOverloads constructor(private val delegate: KmFunctionVisitor? = null) {
     /**
@@ -408,7 +408,7 @@ abstract class KmFunctionVisitor @JvmOverloads constructor(private val delegate:
  * When using this class, zero or more calls to [visitTypeParameter] must be done first, followed by zero or more calls
  * to other visit* methods, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmPropertyVisitor @JvmOverloads constructor(private val delegate: KmPropertyVisitor? = null) {
     /**
@@ -485,7 +485,7 @@ abstract class KmPropertyVisitor @JvmOverloads constructor(private val delegate:
  * When using this class, zero or more calls to [visitTypeParameter] must be done first, followed by zero or more calls
  * to other visit* methods, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmTypeAliasVisitor @JvmOverloads constructor(private val delegate: KmTypeAliasVisitor? = null) {
     /**
@@ -554,7 +554,7 @@ abstract class KmTypeAliasVisitor @JvmOverloads constructor(private val delegate
  * When using this class, either [visitType] or [visitVarargElementType] must be called first (depending on whether the value parameter
  * is `vararg` or not), followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmValueParameterVisitor @JvmOverloads constructor(private val delegate: KmValueParameterVisitor? = null) {
     /**
@@ -594,7 +594,7 @@ abstract class KmValueParameterVisitor @JvmOverloads constructor(private val del
  *
  * When using this class, zero or more [visitUpperBound] calls must be done first, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmTypeParameterVisitor @JvmOverloads constructor(private val delegate: KmTypeParameterVisitor? = null) {
     /**
@@ -632,7 +632,7 @@ abstract class KmTypeParameterVisitor @JvmOverloads constructor(private val dele
  *
  * When using this class, [visitEnd] must be called exactly once and after calls to all other visit* methods.
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 abstract class KmTypeVisitor @JvmOverloads constructor(private val delegate: KmTypeVisitor? = null) {
     /**
@@ -745,7 +745,7 @@ abstract class KmTypeVisitor @JvmOverloads constructor(private val delegate: KmT
  *
  * When using this class, [visit] must be called first, followed by [visitVersion], followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 abstract class KmVersionRequirementVisitor @JvmOverloads constructor(@Suppress("DEPRECATION") private val delegate: KmVersionRequirementVisitor? = null) {
     /**
      * Visits the description of this version requirement.
@@ -787,7 +787,7 @@ abstract class KmVersionRequirementVisitor @JvmOverloads constructor(@Suppress("
  *
  * When using this class, zero or more calls to [visitEffect] must be done first, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 @ExperimentalContracts
 abstract class KmContractVisitor @JvmOverloads constructor(private val delegate: KmContractVisitor? = null) {
@@ -818,7 +818,7 @@ abstract class KmContractVisitor @JvmOverloads constructor(private val delegate:
  * When using this class, zero or more calls to [visitConstructorArgument] or [visitConclusionOfConditionalEffect] must be done first,
  * followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 @ExperimentalContracts
 abstract class KmEffectVisitor @JvmOverloads constructor(private val delegate: KmEffectVisitor? = null) {
@@ -852,7 +852,7 @@ abstract class KmEffectVisitor @JvmOverloads constructor(private val delegate: K
  *
  * When using this class, [visit] must be called first, followed by zero or more calls to other visit* methods, followed by [visitEnd].
  */
-@Deprecated(visitorApiMessage)
+@Deprecated(VISITOR_API_MESSAGE)
 @Suppress("DEPRECATION")
 @ExperimentalContracts
 abstract class KmEffectExpressionVisitor @JvmOverloads constructor(private val delegate: KmEffectExpressionVisitor? = null) {
diff --git a/libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt b/libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt
index f11bc1151d6..07d292c3b18 100644
--- a/libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt
+++ b/libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt
@@ -129,7 +129,7 @@ private fun transformClassFileWithNodes(classFile: KotlinClassMetadata): KotlinC
         else -> classFile
     }
 
-@Suppress("DEPRECATION")
+@Suppress("DEPRECATION") // We're testing that reading/writing with KmNodes is identical to direct
 private fun transformModuleFileWithReadWriteVisitors(moduleFile: KotlinModuleMetadata): KotlinModuleMetadata =
     KotlinModuleMetadata.Writer().apply(moduleFile::accept).write()