private fun computeLeafClassesOrInterfaces(upperBoundClasses: Set<ClassDescriptor>): Set<ClassDescriptor> {
        val isLeaf = mutableMapOf<ClassDescriptor, Boolean>()
        upperBoundClasses.associateWithTo(isLeaf) { true }
        val queue = ArrayDeque(upperBoundClasses)
        while (queue.isNotEmpty()) {

        val descriptor = getDescriptor<ClassDescriptor>(classSymbol)
            ?: return getEmptyScope()

        return KtFe10ScopeMember(descriptor.unsubstitutedMemberScope, descriptor.constructors, analysisContext)
    }

    override fun getStaticMemberScope(symbol: KtSymbolWithMembers): KtScope {
        val descriptor = getDescriptor<ClassDescriptor>(symbol) ?: return getEmptyScope()

        val memberDescriptor = getSymbolDescriptor(memberSymbol) as? DeclarationDescriptorWithVisibility ?: return false
        val classDescriptor = getSymbolDescriptor(classSymbol) ?: return false
        return isVisibleWithAnyReceiver(memberDescriptor, classDescriptor, analysisSession.analysisContext.languageVersionSettings)
    }

    override fun getImplementationStatus(
        memberSymbol: KtCallableSymbol,

        if (subClass == superClass) return false

        val subClassDescriptor = getSymbolDescriptor(subClass) as? ClassDescriptor ?: return false
        val superClassDescriptor = getSymbolDescriptor(superClass) as? ClassDescriptor ?: return false
        return subClassDescriptor.isSubclassOf(superClassDescriptor)
    }

    override val psi: KtEnumEntry,
    override val analysisContext: Fe10AnalysisContext
) : KtEnumEntrySymbol(), KtEnumEntryInitializerSymbol, KtFe10PsiSymbol<KtEnumEntry, ClassDescriptor> {
    override val descriptor: ClassDescriptor? by cached {
        val bindingContext = analysisContext.analyze(psi, AnalysisMode.PARTIAL)
        bindingContext[BindingContext.CLASS, psi]
    }

import org.jetbrains.kotlin.analysis.api.types.KtType
import org.jetbrains.kotlin.descriptors.ClassDescriptor

internal class KtFe10DescAnonymousObjectSymbol(
    override val descriptor: ClassDescriptor,
    override val analysisContext: Fe10AnalysisContext
) : KtAnonymousObjectSymbol(), KtFe10DescMemberSymbol<ClassDescriptor> {
    override val superTypes: List<KtType>

import org.jetbrains.kotlin.analysis.api.types.KtUsualClassType
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.name.ClassId
import org.jetbrains.kotlin.types.SimpleType

internal class KtFe10UsualClassType(
    override val fe10Type: SimpleType,
    private val descriptor: ClassDescriptor,
    override val analysisContext: Fe10AnalysisContext
) : KtUsualClassType(), KtFe10Type {

        get() = analysisSession.token

    override fun getInheritorsOfSealedClass(classSymbol: KtNamedClassOrObjectSymbol): List<KtNamedClassOrObjectSymbol> {
        val classDescriptor = getSymbolDescriptor(classSymbol) as? ClassDescriptor ?: return emptyList()

        val inheritorsProvider = analysisContext.resolveSession.sealedClassInheritorsProvider

import org.jetbrains.kotlin.analysis.api.types.KtType
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.name.ClassId
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.resolve.DescriptorUtils

internal class KtFe10DescNamedClassOrObjectSymbol(
    override val descriptor: ClassDescriptor,
    override val analysisContext: Fe10AnalysisContext

            is ClassDescriptor -> computeClassInternalName(declaration) ?: computeSupertypeInternalName(declaration)
            else -> error("Unexpected declaration type: $declaration")
        }
    }

    private fun computeClassInternalName(descriptor: ClassDescriptor): String? {
        val selfName = descriptor.name.takeIf { !it.isSpecial } ?: return null