if (whenExpression != null) {
                    val subject = whenExpression.subjectExpression ?: return with(analysisSession) { builtinTypes.BOOLEAN }
                    val kotlinType = analysisContext.analyze(subject).getType(subject)
                    return kotlinType?.toKtNonErrorType(analysisContext)
                }
            }

) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.TypeVarianceConflictInExpandedType

internal class SmartcastImpossibleImpl(
    override val desiredType: KtType,
    override val subject: KtExpression,
    override val description: String,
    override val isCastToNotNull: Boolean,
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,

     */
    fun inlineObjectDeclarations(): Set<KtObjectDeclaration> {
        val results = mutableSetOf<KtObjectDeclaration>()

        inlineFunctionsWithBody.forEach { inlineFunction ->
            val body = inlineFunction.bodyExpression ?: return@forEach
            body.accept(object : KtTreeVisitorVoid() {

            return KtCompilationResult.Failure(frontendErrors)
        }

        // The IR backend will try to regenerate object literals defined in inline functions from generated class files during inlining.
        // Hence, we need to be aware of which object declarations are defined in the relevant inline functions.
        val inlineObjectDeclarations = inlineAnalyzer.inlineObjectDeclarations()

import org.jetbrains.org.objectweb.asm.Type

internal class KtFe10JvmTypeMapperContext(private val resolveSession: ResolveSession) : TypeMappingContext<JvmSignatureWriter> {
    companion object {
        fun getNestedType(type: KotlinType): NestedType {
            val possiblyInnerType = type.buildPossiblyInnerType() ?: throw IllegalArgumentException(type.toString())

        conversions[diagnostic] = creator
    }

    private fun build() = KtDiagnosticConverter(conversions)

    companion object {
        inline fun buildConverter(init: KtDiagnosticConverterBuilder.() -> Unit) =
            KtDiagnosticConverterBuilder().apply(init).build()
    }

        this ?: error("Resolution is not performed")
}

class KtFe10AnalysisHandlerExtension(
    private val useSiteModule: KtSourceModule? = null
) : AnalysisHandlerExtension {
    internal companion object {
        fun getInstance(area: AreaInstance, module: KtModule): KtFe10AnalysisHandlerExtension {
            val extensions = AnalysisHandlerExtension.extensionPointName.getExtensions(area)

            }
        )
    }

    fun getScopeSessionFor(session: FirSession): ScopeSession = withValidityAssertion { firResolveSession.getScopeSessionFor(session) }

    companion object {
        internal fun createAnalysisSessionByFirResolveSession(
            firResolveSession: LLFirResolveSession,
            token: KtLifetimeToken,
        ): KtFirAnalysisSession {

                && overriddenDescriptors.isNotEmpty())
    }

internal val ClassDescriptor.isInterfaceLike: Boolean
    get() = when (kind) {
        ClassKind.CLASS, ClassKind.ENUM_CLASS, ClassKind.OBJECT, ClassKind.ENUM_ENTRY -> false
        else -> true
    }

internal fun DeclarationDescriptor.toKtSymbol(analysisContext: Fe10AnalysisContext): KtSymbol? {
    if (this is ClassDescriptor && kind == ClassKind.ENUM_ENTRY) {

        }
    }

    /**
     * Returns the [KtSymbol]s called [fqName] found in the member scope and companion object's member scope of the [KtDeclaration]s that
     * contain the [contextElement].
     *
     * If [fqName] has two or more segments, e.g. `Foo.bar`, the member and companion object scope of the containing [KtDeclaration] will be