val option = classShortenStrategy(classSymbol)
        if (option == ShortenStrategy.DO_NOT_SHORTEN) return null

        // If its parent has a type parameter, we do not shorten it ATM because it will lose its type parameter. See KTIJ-26072
        if (classSymbol.hasTypeParameterFromParent()) return null

 * stub-indexing binary libraries). And in general, querying the symbol names provider might be faster since its sets are cached, which is
 * not necessarily the case for declaration providers (e.g. the IDE declaration provider hitting the index without caching).
 *

 * [Kotlin Multiplatform Mobile](https://kotlinlang.org/lp/mobile/) for sharing code between Android and iOS
 * [Getting Started with Kotlin Multiplatform Mobile Guide](https://kotlinlang.org/docs/mobile/create-first-app.html)
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                    if (fir.resolvedToCompanionObject) {
                        // this flag is true only when companion object is resolved through its containing class name,
                        // so we want to drop companion object own name from the classId
                        referencedClass.classId.outerClassId ?: return referencedSymbolsByFir

        }

        override fun visitElement(element: FirElement) {
            withElement(element) {
                if (element in statements) {
                    // The leaf is in mapping, but its value is still 'null'
                    mapping.computeIfAbsent(element) { _ ->
                        unmappedCount -= 1

            // and the only FIR that we have for that PSI is an implicit invoke call, that means that
            // `Foo.Bar` is definitely not a property access - otherwise it would have had its own FIR.
            // So, it does not make sense to try to resolve such parts of qualifiers as KtCall
            if ((psi as? KtExpression)?.getPossiblyQualifiedCallExpression() == null) {
                return null

     * is somehow changed, then we want to keep the wrapper.
     *
     * Such substitute overrides happen because of inheritance.
     *
     * If the declaration references only its own type parameters, or parameters from the outer declarations, then
     * we consider that it's signature will not be changed by the SUBSTITUTION_OVERRIDE, so the wrapper can be unwrapped.
     *

            // Likewise, the file to compile may be contained in a "platform" multiplatform module, where the `actual` declaration is
            // referenced in the symbol table automatically, but not its `expect` counterpart, because it isn't contained in the files to
            // compile. `shouldReferenceUndiscoveredExpectSymbols` references such `expect` symbols in the symbol table so that they can

     * Expected type of the indexing parameter in array access, for example, in the following code:
     * ```
     * val map = mapOf<Int, String>()
     * map[k] = v
     * ```
     * `k` is indexing parameter and its expected type is `Int`.
     */
    private fun getExpectedTypeOfIndexingParameter(expression: PsiElement): KtType? {

    // `KtFirAnalysisSession`s must be soft-referenced to allow simultaneous garbage collection of an unused `KtFirAnalysisSession` together
    // with its `LLFirSession`.
    private val cache: ConcurrentMap<KtModule, KtAnalysisSession> = ContainerUtil.createConcurrentSoftValueMap()

    init {
        LowMemoryWatcher.register(::clearCaches, project)
    }