}

    override fun getCallableSymbols(nameFilter: KtScopeNameFilter): Sequence<KtCallableSymbol> = withValidityAssertion {
        val context = analysisContext.analyze(ktFile)

        sequence {
            for (declaration in ktFile.declarations) {
                if (declaration is KtCallableDeclaration) {

                import.packageFqName,
                import.relativeParentClassName,
                import.resolvedParentClassId
            )
        }
    }

    override fun getConstructors(): Sequence<KtConstructorSymbol> = withValidityAssertion { emptySequence() }

    // todo cache?
    override fun getPossibleCallableNames(): Set<Name> = withValidityAssertion {
        imports.flatMapTo(hashSetOf()) { import: Import ->

    private val secondWrappedScope = KtFirStarImportingScope(firScope.second, analysisSession)

    override fun getPackageSymbols(nameFilter: KtScopeNameFilter): Sequence<KtPackageSymbol> = withValidityAssertion {
        emptySequence()
    }

    override fun getConstructors(): Sequence<KtConstructorSymbol> = withValidityAssertion { emptySequence() }

    override fun getPossibleCallableNames(): Set<Name> = buildSet {

    override fun getTopLevelCallableSymbols(packageFqName: FqName, name: Name): Sequence<KtCallableSymbol> {
        val packageViewDescriptor = analysisContext.resolveSession.moduleDescriptor.getPackage(packageFqName)
        return packageViewDescriptor.memberScope.getContributedDescriptors(DescriptorKindFilter.ALL, nameFilter = { it == name })
            .asSequence()
            .filter { it.name == name }

    }

    override fun getConstructors(): Sequence<KtConstructorSymbol> = withValidityAssertion {
        emptySequence()
    }

    override fun getPackageSymbols(nameFilter: KtScopeNameFilter): Sequence<KtPackageSymbol> = withValidityAssertion {
        sequence {
            analysisSession.useSitePackageProvider.getSubPackageFqNames(fqName, analysisSession.targetPlatform, nameFilter).forEach {

            is ConeErrorType -> emptySequence()
            is ConeLookupTagBasedType -> getSubstitutedSuperTypes(shouldApproximate)
            else -> emptySequence()
        }.distinct()
    }

    private fun ConeLookupTagBasedType.getSubstitutedSuperTypes(shouldApproximate: Boolean): Sequence<ConeKotlinType> {

    override fun getCallableSymbols(nameFilter: KtScopeNameFilter): Sequence<KtCallableSymbol> = withValidityAssertion {
        return super.getCallableSymbols(nameFilter).filter { it.origin == KtSymbolOrigin.DELEGATED }
    }

    override fun getCallableSymbols(names: Collection<Name>): Sequence<KtCallableSymbol> = withValidityAssertion {

        val declarationGenerators = session.extensionService.declarationGenerators

        val generatedTopLevelClassifiers = declarationGenerators
            .asSequence()
            .flatMap {
                // FIXME this function should be called only once during plugin's lifetime, so this usage is not really correct (2)
                it.getTopLevelClassIds()
            }

- [`KT-42589`](https://youtrack.jetbrains.com/issue/KT-42589) Provide common listOf(value) overload to avoid allocation of the vararg
- [`KT-55091`](https://youtrack.jetbrains.com/issue/KT-55091) Stdlib: Sequence.toSet() and Sequence.toList() may create the collection twice
- [`KT-57617`](https://youtrack.jetbrains.com/issue/KT-57617) Optimize ReversedListReadOnly iterator

        val memberDescriptor = (getSymbolDescriptor(actual) as? MemberDescriptor)?.takeIf { it.isActual } ?: return emptyList()

        return ExpectedActualResolver.findExpectedForActual(memberDescriptor).orEmpty().asSequence()
            .filter { it.key.isCompatibleOrWeaklyIncompatible }
            .flatMap { it.value }
            .map { it.toKtSymbol(analysisContext) as KtDeclarationSymbol }
            .toList()
    }