val classId = ktClassLikeSymbol.classIdIfNonLocal ?: return null
        val owner = analysisSession.getClassLikeSymbol(classId) as? FirRegularClass ?: return null
        val resolver = LocalSamResolver(analysisSession, analysisSession.useSiteSession)
        return resolver.getSamConstructor(owner)?.let {

    if (this === other) return true
    if (other !is KtFe10Symbol) return false
    return DescriptorEquivalenceForOverrides.areEquivalent(
        this.getDescriptor(),
        other.getDescriptor(),
        allowCopiesFromTheSameDeclaration = false
    )
}

internal fun KtFe10Symbol.calculateHashCode(): Int {
    val descriptor = this.getDescriptor()

internal object DeclarationsInPackageProvider {
    internal fun getTopLevelClassifierNamesInPackageProvider(packageFqName: FqName, analysisSession: KtFirAnalysisSession): Set<Name> {
        return buildSet {
            addAll(
                analysisSession.symbolNamesProvider.getTopLevelClassifierNamesInPackage(packageFqName)

        val lookupTag = when (builder) {
            is KtClassTypeBuilder.ByClassId -> {
                val classSymbol = rootModuleSession.symbolProvider.getClassLikeSymbolByClassId(builder.classId)
                    ?: return ConeErrorType(ConeUnresolvedSymbolError(builder.classId)).asKtType() as KtClassType
                classSymbol.toLookupTag()
            }
            is KtClassTypeBuilder.BySymbol -> {

        val bindingContext = analysisContext.analyze(element, AnalysisMode.PARTIAL_WITH_DIAGNOSTICS)
        val diagnostics = bindingContext.diagnostics.forElement(element)
        return diagnostics.map { KtFe10Diagnostic(it, token) }
    }

    override fun collectDiagnosticsForFile(ktFile: KtFile, filter: KtDiagnosticCheckerFilter): Collection<KtDiagnosticWithPsi<*>> {

        return packageFragmentProvider.getSubPackagesOf(owner.fqName, nameFilter)
            .asSequence()
            .map { KtFe10PackageSymbol(it, analysisContext) }
    }

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

) : KtSubstitutorFactory(), KtFirAnalysisSessionComponent {

    override fun buildSubstitutor(builder: KtSubstitutorBuilder): KtSubstitutor {
        if (builder.mappings.isEmpty()) return KtSubstitutor.Empty(token)

        val firSubstitution = buildMap {
            builder.mappings.forEach { (ktTypeParameterSymbol, ktType) ->
                check(ktTypeParameterSymbol is KtFirTypeParameterSymbol)

    override fun restoreSymbol(analysisSession: KtAnalysisSession): KtBackingFieldSymbol? {
        val property = with(analysisSession) { propertySymbolPointer.restoreSymbol() }
        return property?.backingFieldSymbol
    }

    override fun pointsToTheSameSymbolAs(other: KtSymbolPointer<KtSymbol>): Boolean = this === other ||
            other is KtFe10PsiDefaultBackingFieldSymbolPointer &&

        val nullableSuffix = if (type.isMarkedNullable) "?" else ""
        val simpleName = if (shouldRenderFqName(type)) {
            type.qualifiedName
        } else {
            type.simpleName
        }
        return if (type.arguments.isEmpty()) simpleName + nullableSuffix
        else simpleName + type.arguments.joinToString(separator = ", ", prefix = "<", postfix = ">") {
            when (val typeArgument = it.type) {

) : KtScopeSubstitution(), KtFirAnalysisSessionComponent {

    @OptIn(KtAnalysisApiInternals::class)
    override fun getDeclarationScope(scope: KtTypeScope): KtScope {
        return when (scope) {
            is KtFirDelegatingTypeScope -> KtFirDelegatingNamesAwareScope(scope.firScope, analysisSession.firSymbolBuilder)