}

        fun buildFunctionSignature(firSymbol: FirNamedFunctionSymbol): KtFunctionLikeSignature<KtFirFunctionSymbol> {
            firSymbol.lazyResolveToPhase(FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE)
            return KtFirFunctionLikeSubstitutorBasedSignature(analysisSession.token, firSymbol, analysisSession.firSymbolBuilder)
        }

        }

        val firContainer = collectUseSiteContainers(parent, firResolveSession)?.lastOrNull()
        if (firContainer != null) {
            firContainer.lazyResolveToPhase(FirResolvePhase.BODY_RESOLVE)
            return firContainer
        }

        return parent.parentsWithSelf
            .filterIsInstance<KtElement>()
            .firstNotNullOf { it.getOrBuildFir(firResolveSession) }
    }

        return null
    }

    private fun getFullyResolvedFirFile(file: KtFile): FirFile {
        val firFile = file.getOrBuildFirFile(firResolveSession)
        firFile.lazyResolveToPhaseRecursively(FirResolvePhase.BODY_RESOLVE)
        return firFile
    }

    private fun computeErrors(
        diagnostics: Collection<DiagnosticMarker>,
        allowedErrorFilter: (KtDiagnostic) -> Boolean,
    ): List<KtDiagnostic> {

    )

    private fun collectReferencedEntities(file: KtFile): ReferencedEntitiesResult {
        val firFile = file.getOrBuildFirFile(firResolveSession).apply { lazyResolveToPhaseRecursively(FirResolvePhase.BODY_RESOLVE) }
        val usedImports = mutableMapOf<FqName, MutableSet<Name>>()
        val unresolvedNames = mutableSetOf<Name>()

        fun saveReferencedItem(importableName: FqName, referencedByName: Name) {