add(FirErrors.REDUNDANT_NULLABLE) { firDiagnostic ->
        RedundantNullableImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.PLATFORM_CLASS_MAPPED_TO_KOTLIN) { firDiagnostic ->
        PlatformClassMappedToKotlinImpl(
            firDiagnostic.a,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

        return KtFirAnalysisSession.createAnalysisSessionByFirResolveSession(firResolveSession, validityToken)
    }

    override fun clearCaches() {
        cache.clear()
    }

    /**
     * Note: Races cannot happen because the listener is guaranteed to be invoked in a write action.
     */
    internal class SessionInvalidationListener(val project: Project) : LLFirSessionInvalidationListener {