firDiagnostic.a,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.REDUNDANT_MODIFIER) { firDiagnostic ->
        RedundantModifierImpl(
            firDiagnostic.a,
            firDiagnostic.b,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

    firDiagnostic: KtPsiDiagnostic,
    token: KaLifetimeToken,
) : KaAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KaFirDiagnostic.RepeatedModifier

internal class RedundantModifierImpl(
    override val redundantModifier: KtModifierKeywordToken,
    override val conflictingModifier: KtModifierKeywordToken,
    firDiagnostic: KtPsiDiagnostic,
    token: KaLifetimeToken,