token,
        )
    }
    add(FirErrors.OPT_IN_ARGUMENT_IS_NOT_MARKER) { firDiagnostic ->
        OptInArgumentIsNotMarkerImpl(
            firDiagnostic.a,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.OPT_IN_MARKER_WITH_WRONG_TARGET) { firDiagnostic ->
        OptInMarkerWithWrongTargetImpl(
            firDiagnostic.a,

## 1.9.21

### Compiler

- [`KT-62885`](https://youtrack.jetbrains.com/issue/KT-62885) Introduce a language feature entry for expect actual classes for easier configuration of MPP projects
- [`KT-63081`](https://youtrack.jetbrains.com/issue/KT-63081) Optimize new native caches: CachedLibraries.computeVersionedCacheDirectory()

### Docs & Examples

         * with [getCompositeScope]) avoids duplicate inner classes, as they are contained in non-static and static scopes.
         *
         * A proper combined declared member scope kind also makes it easier to cache combined scopes directly (if needed).
         */
        COMBINED,
    }

    private fun getDeclaredMemberScope(classSymbol: KtSymbolWithMembers, kind: DeclaredMemberScopeKind): KtScope {