internal class SyntaxImpl(
    override val message: String,
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.Syntax

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

    }

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

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

    interface NestedExternalDeclaration : KtFirDiagnostic<KtExpression> {

                firSymbolBuilder.buildSymbol(firBasedSymbol)
            },
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.DEPRECATED_TYPE_PARAMETER_SYNTAX) { firDiagnostic ->
        DeprecatedTypeParameterSyntaxImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }