Migrate UseExperimental->OptIn in project sources

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/builder/FirLabelBuilder.kt

@@ -31,7 +31,7 @@ class FirLabelBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildLabel(init: FirLabelBuilder.() -> Unit): FirLabel {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/contracts/builder/FirContractDescriptionBuilder.kt

@@ -32,7 +32,7 @@ class FirContractDescriptionBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildContractDescription(init: FirContractDescriptionBuilder.() -> Unit = {}): FirContractDescription {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirAnonymousFunctionBuilder.kt

@@ -71,7 +71,7 @@ class FirAnonymousFunctionBuilder : FirFunctionBuilder, FirAnnotationContainerBu
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildAnonymousFunction(init: FirAnonymousFunctionBuilder.() -> Unit): FirAnonymousFunction {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirAnonymousInitializerBuilder.kt

@@ -38,7 +38,7 @@ class FirAnonymousInitializerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildAnonymousInitializer(init: FirAnonymousInitializerBuilder.() -> Unit): FirAnonymousInitializer {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirAnonymousObjectBuilder.kt

@@ -59,7 +59,7 @@ class FirAnonymousObjectBuilder : FirClassBuilder, FirAnnotationContainerBuilder
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildAnonymousObject(init: FirAnonymousObjectBuilder.() -> Unit): FirAnonymousObject {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirClassImplBuilder.kt

@@ -73,7 +73,7 @@ open class FirClassImplBuilder : AbstractFirRegularClassBuilder, FirAnnotationCo
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildClassImpl(init: FirClassImplBuilder.() -> Unit): FirRegularClass {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirConstructorBuilder.kt

@@ -75,7 +75,7 @@ open class FirConstructorBuilder : FirAbstractConstructorBuilder, FirAnnotationC
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildConstructor(init: FirConstructorBuilder.() -> Unit): FirConstructor {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirDefaultSetterValueParameterBuilder.kt

@@ -73,7 +73,7 @@ class FirDefaultSetterValueParameterBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDefaultSetterValueParameter(init: FirDefaultSetterValueParameterBuilder.() -> Unit): FirValueParameter {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirEnumEntryBuilder.kt

@@ -62,7 +62,7 @@ class FirEnumEntryBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildEnumEntry(init: FirEnumEntryBuilder.() -> Unit): FirEnumEntry {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirErrorFunctionBuilder.kt

@@ -56,7 +56,7 @@ class FirErrorFunctionBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildErrorFunction(init: FirErrorFunctionBuilder.() -> Unit): FirErrorFunction {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirFieldBuilder.kt

@@ -62,7 +62,7 @@ open class FirFieldBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildField(init: FirFieldBuilder.() -> Unit): FirField {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirFileBuilder.kt

@@ -50,7 +50,7 @@ class FirFileBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildFile(init: FirFileBuilder.() -> Unit): FirFile {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirImportBuilder.kt

@@ -37,7 +37,7 @@ class FirImportBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildImport(init: FirImportBuilder.() -> Unit): FirImport {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirPrimaryConstructorBuilder.kt

@@ -75,7 +75,7 @@ class FirPrimaryConstructorBuilder : FirAbstractConstructorBuilder, FirAnnotatio
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildPrimaryConstructor(init: FirPrimaryConstructorBuilder.() -> Unit): FirConstructor {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirPropertyAccessorBuilder.kt

@@ -48,7 +48,7 @@ class FirPropertyAccessorBuilder : FirFunctionBuilder, FirAnnotationContainerBui
     lateinit var status: FirDeclarationStatus
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirPropertyAccessor {
         return FirPropertyAccessorImpl(
             source,
@@ -67,7 +67,7 @@ class FirPropertyAccessorBuilder : FirFunctionBuilder, FirAnnotationContainerBui
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildPropertyAccessor(init: FirPropertyAccessorBuilder.() -> Unit): FirPropertyAccessor {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirPropertyBuilder.kt

@@ -80,7 +80,7 @@ class FirPropertyBuilder : FirTypeParametersOwnerBuilder, FirAnnotationContainer
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildProperty(init: FirPropertyBuilder.() -> Unit): FirProperty {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirResolvedImportBuilder.kt

@@ -37,7 +37,7 @@ class FirResolvedImportBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedImport(init: FirResolvedImportBuilder.() -> Unit): FirResolvedImport {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirSealedClassBuilder.kt

@@ -77,7 +77,7 @@ class FirSealedClassBuilder : AbstractFirRegularClassBuilder, FirAnnotationConta
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildSealedClass(init: FirSealedClassBuilder.() -> Unit): FirSealedClass {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirSimpleFunctionBuilder.kt

@@ -52,7 +52,7 @@ open class FirSimpleFunctionBuilder : FirFunctionBuilder, FirTypeParametersOwner
     open lateinit var symbol: FirFunctionSymbol<FirSimpleFunction>
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirSimpleFunction {
         return FirSimpleFunctionImpl(
             source,
@@ -73,7 +73,7 @@ open class FirSimpleFunctionBuilder : FirFunctionBuilder, FirTypeParametersOwner
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildSimpleFunction(init: FirSimpleFunctionBuilder.() -> Unit): FirSimpleFunction {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirTypeAliasBuilder.kt

@@ -55,7 +55,7 @@ class FirTypeAliasBuilder : FirTypeParametersOwnerBuilder, FirAnnotationContaine
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildTypeAlias(init: FirTypeAliasBuilder.() -> Unit): FirTypeAlias {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirTypeParameterBuilder.kt

@@ -53,7 +53,7 @@ class FirTypeParameterBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildTypeParameter(init: FirTypeParameterBuilder.() -> Unit): FirTypeParameter {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirValueParameterBuilder.kt

@@ -42,7 +42,7 @@ open class FirValueParameterBuilder : FirAnnotationContainerBuilder {
     open var isNoinline: Boolean by kotlin.properties.Delegates.notNull<Boolean>()
     open var isVararg: Boolean by kotlin.properties.Delegates.notNull<Boolean>()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirValueParameter {
         return FirValueParameterImpl(
             source,
@@ -61,7 +61,7 @@ open class FirValueParameterBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildValueParameter(init: FirValueParameterBuilder.() -> Unit): FirValueParameter {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirAnnotationCallBuilder.kt

@@ -50,7 +50,7 @@ class FirAnnotationCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder,
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildAnnotationCall(init: FirAnnotationCallBuilder.() -> Unit): FirAnnotationCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirArrayOfCallBuilder.kt

@@ -47,7 +47,7 @@ class FirArrayOfCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder, Fir
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildArrayOfCall(init: FirArrayOfCallBuilder.() -> Unit = {}): FirArrayOfCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirArraySetCallBuilder.kt

@@ -58,7 +58,7 @@ class FirArraySetCallBuilder : FirQualifiedAccessBuilder, FirAnnotationContainer
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildArraySetCall(init: FirArraySetCallBuilder.() -> Unit): FirArraySetCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirBinaryLogicExpressionBuilder.kt

@@ -51,7 +51,7 @@ class FirBinaryLogicExpressionBuilder : FirAnnotationContainerBuilder, FirExpres
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildBinaryLogicExpression(init: FirBinaryLogicExpressionBuilder.() -> Unit): FirBinaryLogicExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirBlockBuilder.kt

@@ -46,7 +46,7 @@ class FirBlockBuilder : FirAnnotationContainerBuilder, FirExpressionBuilder {
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildBlock(init: FirBlockBuilder.() -> Unit = {}): FirBlock {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirBreakExpressionBuilder.kt

@@ -48,7 +48,7 @@ class FirBreakExpressionBuilder : FirLoopJumpBuilder, FirAnnotationContainerBuil
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildBreakExpression(init: FirBreakExpressionBuilder.() -> Unit): FirBreakExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirCallableReferenceAccessBuilder.kt

@@ -56,7 +56,7 @@ class FirCallableReferenceAccessBuilder : FirQualifiedAccessBuilder, FirAnnotati
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildCallableReferenceAccess(init: FirCallableReferenceAccessBuilder.() -> Unit): FirCallableReferenceAccess {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirCatchBuilder.kt

@@ -35,7 +35,7 @@ class FirCatchBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildCatch(init: FirCatchBuilder.() -> Unit): FirCatch {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirCheckNotNullCallBuilder.kt

@@ -45,7 +45,7 @@ class FirCheckNotNullCallBuilder : FirAnnotationContainerBuilder, FirExpressionB
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildCheckNotNullCall(init: FirCheckNotNullCallBuilder.() -> Unit = {}): FirCheckNotNullCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirClassReferenceExpressionBuilder.kt

@@ -45,7 +45,7 @@ class FirClassReferenceExpressionBuilder : FirAnnotationContainerBuilder, FirExp
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildClassReferenceExpression(init: FirClassReferenceExpressionBuilder.() -> Unit): FirClassReferenceExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirComparisonExpressionBuilder.kt

@@ -49,7 +49,7 @@ class FirComparisonExpressionBuilder : FirAnnotationContainerBuilder, FirExpress
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildComparisonExpression(init: FirComparisonExpressionBuilder.() -> Unit): FirComparisonExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirComponentCallBuilder.kt

@@ -59,7 +59,7 @@ class FirComponentCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder, F
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildComponentCall(init: FirComponentCallBuilder.() -> Unit): FirComponentCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirContinueExpressionBuilder.kt

@@ -48,7 +48,7 @@ class FirContinueExpressionBuilder : FirLoopJumpBuilder, FirAnnotationContainerB
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildContinueExpression(init: FirContinueExpressionBuilder.() -> Unit): FirContinueExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirDelegatedConstructorCallBuilder.kt

@@ -45,7 +45,7 @@ class FirDelegatedConstructorCallBuilder : FirCallBuilder, FirAnnotationContaine
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDelegatedConstructorCall(init: FirDelegatedConstructorCallBuilder.() -> Unit): FirDelegatedConstructorCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirDoWhileLoopBuilder.kt

@@ -43,7 +43,7 @@ class FirDoWhileLoopBuilder : FirLoopBuilder, FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDoWhileLoop(init: FirDoWhileLoopBuilder.() -> Unit): FirDoWhileLoop {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirElseIfTrueConditionBuilder.kt

@@ -27,7 +27,7 @@ class FirElseIfTrueConditionBuilder : FirAnnotationContainerBuilder {
     override var source: FirSourceElement? = null
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirExpression {
         return FirElseIfTrueCondition(
             source,
@@ -37,7 +37,7 @@ class FirElseIfTrueConditionBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildElseIfTrueCondition(init: FirElseIfTrueConditionBuilder.() -> Unit = {}): FirExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirEmptyExpressionBlockBuilder.kt

@@ -24,7 +24,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-@UseExperimental(FirImplementationDetail::class)
+@OptIn(FirImplementationDetail::class)
 fun buildEmptyExpressionBlock(): FirBlock {
     return FirEmptyExpressionBlock()
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirErrorExpressionBuilder.kt

@@ -47,7 +47,7 @@ class FirErrorExpressionBuilder : FirAnnotationContainerBuilder, FirExpressionBu
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildErrorExpression(init: FirErrorExpressionBuilder.() -> Unit): FirErrorExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirErrorLoopBuilder.kt

@@ -42,7 +42,7 @@ class FirErrorLoopBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildErrorLoop(init: FirErrorLoopBuilder.() -> Unit): FirErrorLoop {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirExpressionStubBuilder.kt

@@ -28,7 +28,7 @@ class FirExpressionStubBuilder : FirAnnotationContainerBuilder {
     var typeRef: FirTypeRef = FirImplicitTypeRefImpl(null)
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirExpression {
         return FirExpressionStub(
             source,
@@ -39,7 +39,7 @@ class FirExpressionStubBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildExpressionStub(init: FirExpressionStubBuilder.() -> Unit = {}): FirExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirFunctionCallBuilder.kt

@@ -43,7 +43,7 @@ open class FirFunctionCallBuilder : FirQualifiedAccessBuilder, FirCallBuilder, F
     override val arguments: MutableList<FirExpression> = mutableListOf()
     open lateinit var calleeReference: FirNamedReference
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirFunctionCall {
         return FirFunctionCallImpl(
             source,
@@ -61,7 +61,7 @@ open class FirFunctionCallBuilder : FirQualifiedAccessBuilder, FirCallBuilder, F
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildFunctionCall(init: FirFunctionCallBuilder.() -> Unit): FirFunctionCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirGetClassCallBuilder.kt

@@ -47,7 +47,7 @@ class FirGetClassCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder, Fi
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildGetClassCall(init: FirGetClassCallBuilder.() -> Unit = {}): FirGetClassCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirLambdaArgumentExpressionBuilder.kt

@@ -45,7 +45,7 @@ class FirLambdaArgumentExpressionBuilder : FirAnnotationContainerBuilder, FirExp
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildLambdaArgumentExpression(init: FirLambdaArgumentExpressionBuilder.() -> Unit): FirLambdaArgumentExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirNamedArgumentExpressionBuilder.kt

@@ -50,7 +50,7 @@ class FirNamedArgumentExpressionBuilder : FirAnnotationContainerBuilder, FirExpr
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildNamedArgumentExpression(init: FirNamedArgumentExpressionBuilder.() -> Unit): FirNamedArgumentExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirOperatorCallBuilder.kt

@@ -51,7 +51,7 @@ class FirOperatorCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder, Fi
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildOperatorCall(init: FirOperatorCallBuilder.() -> Unit): FirOperatorCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirQualifiedAccessExpressionBuilder.kt

@@ -56,7 +56,7 @@ class FirQualifiedAccessExpressionBuilder : FirQualifiedAccessBuilder, FirAnnota
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildQualifiedAccessExpression(init: FirQualifiedAccessExpressionBuilder.() -> Unit): FirQualifiedAccessExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirResolvedQualifierBuilder.kt

@@ -52,7 +52,7 @@ class FirResolvedQualifierBuilder : FirAnnotationContainerBuilder, FirExpression
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedQualifier(init: FirResolvedQualifierBuilder.() -> Unit): FirResolvedQualifier {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirResolvedReifiedParameterReferenceBuilder.kt

@@ -41,7 +41,7 @@ class FirResolvedReifiedParameterReferenceBuilder : FirAnnotationContainerBuilde
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedReifiedParameterReference(init: FirResolvedReifiedParameterReferenceBuilder.() -> Unit): FirResolvedReifiedParameterReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirReturnExpressionBuilder.kt

@@ -50,7 +50,7 @@ class FirReturnExpressionBuilder : FirAnnotationContainerBuilder, FirExpressionB
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildReturnExpression(init: FirReturnExpressionBuilder.() -> Unit): FirReturnExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirSpreadArgumentExpressionBuilder.kt

@@ -45,7 +45,7 @@ class FirSpreadArgumentExpressionBuilder : FirAnnotationContainerBuilder, FirExp
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildSpreadArgumentExpression(init: FirSpreadArgumentExpressionBuilder.() -> Unit): FirSpreadArgumentExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirStringConcatenationCallBuilder.kt

@@ -47,7 +47,7 @@ class FirStringConcatenationCallBuilder : FirCallBuilder, FirAnnotationContainer
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildStringConcatenationCall(init: FirStringConcatenationCallBuilder.() -> Unit = {}): FirStringConcatenationCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirThisReceiverExpressionBuilder.kt

@@ -76,7 +76,7 @@ class FirThisReceiverExpressionBuilder : FirQualifiedAccessBuilder, FirAnnotatio
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildThisReceiverExpression(init: FirThisReceiverExpressionBuilder.() -> Unit): FirThisReceiverExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirThrowExpressionBuilder.kt

@@ -46,7 +46,7 @@ class FirThrowExpressionBuilder : FirAnnotationContainerBuilder, FirExpressionBu
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildThrowExpression(init: FirThrowExpressionBuilder.() -> Unit): FirThrowExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirTryExpressionBuilder.kt

@@ -50,7 +50,7 @@ class FirTryExpressionBuilder : FirAnnotationContainerBuilder, FirExpressionBuil
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildTryExpression(init: FirTryExpressionBuilder.() -> Unit): FirTryExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirTypeOperatorCallBuilder.kt

@@ -52,7 +52,7 @@ class FirTypeOperatorCallBuilder : FirCallBuilder, FirAnnotationContainerBuilder
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildTypeOperatorCall(init: FirTypeOperatorCallBuilder.() -> Unit): FirTypeOperatorCall {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirUnitExpressionBuilder.kt

@@ -27,7 +27,7 @@ class FirUnitExpressionBuilder : FirAnnotationContainerBuilder {
     override var source: FirSourceElement? = null
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     override fun build(): FirExpression {
         return FirUnitExpression(
             source,
@@ -37,7 +37,7 @@ class FirUnitExpressionBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildUnitExpression(init: FirUnitExpressionBuilder.() -> Unit = {}): FirExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirVarargArgumentsExpressionBuilder.kt

@@ -43,7 +43,7 @@ class FirVarargArgumentsExpressionBuilder : FirAnnotationContainerBuilder, FirEx
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildVarargArgumentsExpression(init: FirVarargArgumentsExpressionBuilder.() -> Unit): FirVarargArgumentsExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirVariableAssignmentBuilder.kt

@@ -53,7 +53,7 @@ class FirVariableAssignmentBuilder : FirQualifiedAccessBuilder, FirAnnotationCon
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildVariableAssignment(init: FirVariableAssignmentBuilder.() -> Unit): FirVariableAssignment {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWhenBranchBuilder.kt

@@ -35,7 +35,7 @@ class FirWhenBranchBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildWhenBranch(init: FirWhenBranchBuilder.() -> Unit): FirWhenBranch {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWhenExpressionBuilder.kt

@@ -53,7 +53,7 @@ class FirWhenExpressionBuilder : FirAnnotationContainerBuilder, FirExpressionBui
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildWhenExpression(init: FirWhenExpressionBuilder.() -> Unit = {}): FirWhenExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWhenSubjectExpressionBuilder.kt

@@ -45,7 +45,7 @@ class FirWhenSubjectExpressionBuilder : FirAnnotationContainerBuilder, FirExpres
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildWhenSubjectExpression(init: FirWhenSubjectExpressionBuilder.() -> Unit): FirWhenSubjectExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWhileLoopBuilder.kt

@@ -43,7 +43,7 @@ class FirWhileLoopBuilder : FirLoopBuilder, FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildWhileLoop(init: FirWhileLoopBuilder.() -> Unit): FirWhileLoop {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWrappedDelegateExpressionBuilder.kt

@@ -47,7 +47,7 @@ class FirWrappedDelegateExpressionBuilder : FirAnnotationContainerBuilder, FirEx
         }
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildWrappedDelegateExpression(init: FirWrappedDelegateExpressionBuilder.() -> Unit): FirWrappedDelegateExpression {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/impl/FirComponentCallImpl.kt

@@ -24,7 +24,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-@UseExperimental(FirImplementationDetail::class)
+@OptIn(FirImplementationDetail::class)
 internal class FirComponentCallImpl(
     override val source: FirSourceElement?,
     override val annotations: MutableList<FirAnnotationCall>,

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirBackingFieldReferenceBuilder.kt

@@ -36,7 +36,7 @@ class FirBackingFieldReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildBackingFieldReference(init: FirBackingFieldReferenceBuilder.() -> Unit): FirBackingFieldReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirDelegateFieldReferenceBuilder.kt

@@ -36,7 +36,7 @@ class FirDelegateFieldReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDelegateFieldReference(init: FirDelegateFieldReferenceBuilder.() -> Unit): FirDelegateFieldReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirErrorNamedReferenceBuilder.kt

@@ -34,7 +34,7 @@ class FirErrorNamedReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildErrorNamedReference(init: FirErrorNamedReferenceBuilder.() -> Unit): FirErrorNamedReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirExplicitSuperReferenceBuilder.kt

@@ -32,7 +32,7 @@ class FirExplicitSuperReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildExplicitSuperReference(init: FirExplicitSuperReferenceBuilder.() -> Unit): FirSuperReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirExplicitThisReferenceBuilder.kt

@@ -32,7 +32,7 @@ class FirExplicitThisReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildExplicitThisReference(init: FirExplicitThisReferenceBuilder.() -> Unit = {}): FirThisReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirImplicitThisReferenceBuilder.kt

@@ -30,7 +30,7 @@ class FirImplicitThisReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildImplicitThisReference(init: FirImplicitThisReferenceBuilder.() -> Unit = {}): FirThisReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirPropertyFromParameterResolvedNamedReferenceBuilder.kt

@@ -26,7 +26,7 @@ class FirPropertyFromParameterResolvedNamedReferenceBuilder {
     lateinit var name: Name
     lateinit var resolvedSymbol: AbstractFirBasedSymbol<*>
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     fun build(): FirResolvedNamedReference {
         return FirPropertyFromParameterResolvedNamedReference(
             source,
@@ -37,7 +37,7 @@ class FirPropertyFromParameterResolvedNamedReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildPropertyFromParameterResolvedNamedReference(init: FirPropertyFromParameterResolvedNamedReferenceBuilder.() -> Unit): FirResolvedNamedReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirResolvedCallableReferenceBuilder.kt

@@ -38,7 +38,7 @@ class FirResolvedCallableReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedCallableReference(init: FirResolvedCallableReferenceBuilder.() -> Unit): FirResolvedCallableReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirResolvedNamedReferenceBuilder.kt

@@ -35,7 +35,7 @@ class FirResolvedNamedReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedNamedReference(init: FirResolvedNamedReferenceBuilder.() -> Unit): FirResolvedNamedReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/references/builder/FirSimpleNamedReferenceBuilder.kt

@@ -26,7 +26,7 @@ class FirSimpleNamedReferenceBuilder {
     lateinit var name: Name
     var candidateSymbol: AbstractFirBasedSymbol<*>? = null
 
-    @UseExperimental(FirImplementationDetail::class)
+    @OptIn(FirImplementationDetail::class)
     fun build(): FirNamedReference {
         return FirSimpleNamedReference(
             source,
@@ -37,7 +37,7 @@ class FirSimpleNamedReferenceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildSimpleNamedReference(init: FirSimpleNamedReferenceBuilder.() -> Unit): FirNamedReference {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirComposedSuperTypeRefBuilder.kt

@@ -36,7 +36,7 @@ class FirComposedSuperTypeRefBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildComposedSuperTypeRef(init: FirComposedSuperTypeRefBuilder.() -> Unit = {}): FirComposedSuperTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirDelegatedTypeRefBuilder.kt

@@ -34,7 +34,7 @@ class FirDelegatedTypeRefBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDelegatedTypeRef(init: FirDelegatedTypeRefBuilder.() -> Unit): FirDelegatedTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirDynamicTypeRefBuilder.kt

@@ -35,7 +35,7 @@ class FirDynamicTypeRefBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildDynamicTypeRef(init: FirDynamicTypeRefBuilder.() -> Unit): FirDynamicTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirErrorTypeRefBuilder.kt

@@ -40,7 +40,7 @@ class FirErrorTypeRefBuilder : FirAnnotationContainerBuilder {
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildErrorTypeRef(init: FirErrorTypeRefBuilder.() -> Unit): FirErrorTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirFunctionTypeRefBuilder.kt

@@ -44,7 +44,7 @@ class FirFunctionTypeRefBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildFunctionTypeRef(init: FirFunctionTypeRefBuilder.() -> Unit): FirFunctionTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirImplicitTypeRefBuilder.kt

@@ -30,7 +30,7 @@ class FirImplicitTypeRefBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildImplicitTypeRef(init: FirImplicitTypeRefBuilder.() -> Unit = {}): FirImplicitTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirResolvedFunctionTypeRefBuilder.kt

@@ -46,7 +46,7 @@ class FirResolvedFunctionTypeRefBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedFunctionTypeRef(init: FirResolvedFunctionTypeRefBuilder.() -> Unit): FirResolvedFunctionTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirResolvedTypeRefBuilder.kt

@@ -39,7 +39,7 @@ class FirResolvedTypeRefBuilder : FirAnnotationContainerBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildResolvedTypeRef(init: FirResolvedTypeRefBuilder.() -> Unit): FirResolvedTypeRef {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirStarProjectionBuilder.kt

@@ -29,7 +29,7 @@ class FirStarProjectionBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildStarProjection(init: FirStarProjectionBuilder.() -> Unit = {}): FirStarProjection {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirTypeProjectionWithVarianceBuilder.kt

@@ -35,7 +35,7 @@ class FirTypeProjectionWithVarianceBuilder {
 
 }
 
-@UseExperimental(ExperimentalContracts::class)
+@OptIn(ExperimentalContracts::class)
 inline fun buildTypeProjectionWithVariance(init: FirTypeProjectionWithVarianceBuilder.() -> Unit): FirTypeProjectionWithVariance {
     contract {
         callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirDefaultPropertyAccessor.kt

@@ -22,7 +22,7 @@ import org.jetbrains.kotlin.fir.types.impl.FirImplicitUnitTypeRef
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 
-@UseExperimental(FirImplementationDetail::class)
+@OptIn(FirImplementationDetail::class)
 abstract class FirDefaultPropertyAccessor(
     source: FirSourceElement?,
     session: FirSession,

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/builder.kt

@@ -64,7 +64,7 @@ private fun SmartPrinter.printBuilder(builder: Builder) {
             is IntermediateBuilder -> builder.materializedElement!!.typeWithArguments.replace(Regex("<.>"), "<*>")
         }
         if (builder is LeafBuilder && builder.implementation.isPublic) {
-            println("@UseExperimental(FirImplementationDetail::class)")
+            println("@OptIn(FirImplementationDetail::class)")
         }
         if (builder.parents.isNotEmpty()) {
             print("override ")
@@ -226,10 +226,10 @@ private fun SmartPrinter.printDslBuildFunction(
 ) {
     val isEmpty = builder.allFields.isEmpty()
     if (!isEmpty) {
-        println("@UseExperimental(ExperimentalContracts::class)")
+        println("@OptIn(ExperimentalContracts::class)")
         print("inline ")
     } else if(builder.implementation.isPublic) {
-        println("@UseExperimental(FirImplementationDetail::class)")
+        println("@OptIn(FirImplementationDetail::class)")
     }
     print("fun ")
     builder.implementation.element.typeArguments.takeIf { it.isNotEmpty() }?.let {

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/printer/implementation.kt

@@ -46,7 +46,7 @@ fun SmartPrinter.printImplementation(implementation: Implementation) {
 
     with(implementation) {
         if (requiresOptIn) {
-            println("@UseExperimental(FirImplementationDetail::class)")
+            println("@OptIn(FirImplementationDetail::class)")
         }
         if (!isPublic) {
             print("internal ")