firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<KtExpression>(firDiagnostic, token), KtFirDiagnostic.DelegateSpecialFunctionReturnTypeMismatch

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

            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.UNDERSCORE_IS_RESERVED) { firDiagnostic ->
        UnderscoreIsReservedImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.UNDERSCORE_USAGE_WITHOUT_BACKTICKS) { firDiagnostic ->
        UnderscoreUsageWithoutBackticksImpl(