NameContainsIllegalCharsImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirJsErrors.JS_NAME_CLASH) { firDiagnostic ->
        JsNameClashImpl(
            firDiagnostic.a,
            firDiagnostic.b.map { firBasedSymbol ->
                firSymbolBuilder.buildSymbol(firBasedSymbol)
            },
            firDiagnostic as KtPsiDiagnostic,

    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<KtElement>(firDiagnostic, token), KtFirDiagnostic.NameContainsIllegalChars

internal class JsNameClashImpl(
    override val name: String,
    override val existing: List<KtSymbol>,
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,