internal class NotAClassImpl(
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.NotAClass

internal class WrongExtensionFunctionTypeImpl(
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,

    interface RepeatedAnnotationWarning : KtFirDiagnostic<PsiElement> {
        override val diagnosticClass get() = RepeatedAnnotationWarning::class
    }

    interface NotAClass : KtFirDiagnostic<PsiElement> {
        override val diagnosticClass get() = NotAClass::class
    }

    interface WrongExtensionFunctionType : KtFirDiagnostic<KtAnnotationEntry> {
        override val diagnosticClass get() = WrongExtensionFunctionType::class