firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.VAL_REASSIGNMENT_VIA_BACKING_FIELD.warningFactory) { firDiagnostic ->
        ValReassignmentViaBackingFieldWarningImpl(
            firSymbolBuilder.variableLikeBuilder.buildVariableSymbol(firDiagnostic.a.fir.propertySymbol),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

    firDiagnostic: KtPsiDiagnostic,
    token: KaLifetimeToken,
) : KaAbstractFirDiagnostic<KtExpression>(firDiagnostic, token), KaFirDiagnostic.ValReassignmentViaBackingFieldError

internal class ValReassignmentViaBackingFieldWarningImpl(
    override val property: KaVariableSymbol,
    firDiagnostic: KtPsiDiagnostic,
    token: KaLifetimeToken,