private val KtExpression.isExplicitSmartCastInfoTarget: Boolean
        get() {
            // we want to handle only most top-level parenthesised expressions
            if (parent is KtParenthesizedExpression) return false

            // expressions like `|foo.bar()|` or `|foo?.baz()|` are ignored
            if (this is KtQualifiedExpression && selectorExpression is KtCallExpression) return false

        return when (val parent = descriptor.containingDeclaration) {
            is PackageFragmentDescriptor -> {
                val packageInternalName = parent.fqName.asString().replace('.', '/')
                "$packageInternalName/$selfName"
            }
            is ClassDescriptor -> {
                val parentInternalName = computeClassInternalName(parent)

internal class KtFirKDocReference(element: KDocName) : KDocReference(element), KtFirReference {
    override fun KtAnalysisSession.resolveToSymbols(): Collection<KtSymbol> {
        val fullFqName = generateSequence(element) { it.parent as? KDocName }.last().getQualifiedNameAsFqName()
        val selectedFqName = element.getQualifiedNameAsFqName()
        return KDocReferenceResolver.resolveKdocFqName(analysisSession, selectedFqName, fullFqName, element)
    }

                    // Stubbed top-level function IR symbols (from other source files in the module) require a parent facade class to be
                    // generated, which requires a container source to be provided. Without a facade class, function IR symbols will have
                    // an `IrExternalPackageFragment` parent, which trips up code generation during IR lowering.
                    val psiSourceFile =

        var parent = parent
        while (parent is KtDotQualifiedExpression) {
            if (parent.selectorExpression !== this) return true
            parent = parent.parent
        }
        return false
    }

    private fun KtSimpleNameExpression.isPartOfUserTypeRefQualifier(): Boolean {
        var parent = parent
        while (parent is KtUserType) {

    }

    private fun getContainingCallExpression(argument: KtValueArgument): KtCallExpression? {
        return when (val parent = argument.parent) {
            is KtCallExpression -> parent
            is KtValueArgumentList -> parent.parent as? KtCallExpression
            else -> null
        }
    }

    override fun isDefinitelyNull(expression: KtExpression): Boolean {

    }
}

private fun findContainingNonLocalDeclaration(element: PsiElement): KtCallableDeclaration? {
    for (parent in element.parentsWithSelf) {
        if (parent is KtCallableDeclaration && !KtPsiUtil.isLocal(parent)) {
            return parent
        }
    }

    return null

            else -> null
        }
    }

    private fun PsiElement.getContainingPsiDeclaration(): KtDeclaration? {
        for (parent in parents) {
            if (parent is KtDeclaration && parent !is KtDestructuringDeclaration) {
                return parent.originalDeclaration ?: parent
            }
        }

        return null
    }

        val parent = parent
        return when {
            parent is KtParameter && parent.ownerFunction != null && parent.typeReference === this ->
                parent.resolveToFirSymbolOfTypeSafe<FirValueParameterSymbol>(firResolveSession, FirResolvePhase.TYPES)?.fir?.returnTypeRef

            parent is KtCallableDeclaration && (parent is KtNamedFunction || parent is KtProperty)

            is KtWhenCondition ->
                doesParentUseChild(parent.parent, parent)

            // Type parameters, return types and other annotations are all contained in KtUserType,
            // and are never considered used as expressions
            is KtUserType ->
                false