* [CallableDescriptor.getOverriddenDescriptors] instead, which is separate from [CallableDescriptor.getOriginal].
 */
@Suppress("UNCHECKED_CAST")
private fun <T : CallableDescriptor> T.unwrapUseSiteSubstitutionOverride(): T {
    var current: CallableDescriptor = this
    while (original != current) {
        current = current.original
    }

     * prefixed with a suitable extension receiver type (like in `Foo.bar`, or `foo.Foo.bar`).
     *
     * Relies on the fact that in such references only the last qualifier refers to the
     * actual extension callable, and the part before that refers to the receiver type (either fully
     * or partially qualified).
     *

    private fun findFakePackageToShorten(typeElement: KtUserType): ElementToShorten? {
        val deepestTypeWithQualifier = typeElement.qualifiedTypesWithSelf.last()

        return if (deepestTypeWithQualifier.hasFakeRootPrefix()) createElementToShorten(deepestTypeWithQualifier) else null
    }

    fun processTypeQualifier(resolvedQualifier: FirResolvedQualifier) {

                // E.g., coreR.string.hello
                //   -> string.hello (drop the first segment)
                //   test.pkg.R.string.hello
                //   -> string.hello (take last two segments, where the size is determined by the size of qualified access minus 1)
                val fixedQualifiedAccessSegments = qualifiedAccessSegments.drop(1)

                        argumentMapping?.entries
                    }
                @Suppress("UNCHECKED_CAST") // safe because of the above check on targetKtSymbol
                KtSimpleFunctionCall(
                    partiallyAppliedSymbol as KtPartiallyAppliedFunctionSymbol<KtFunctionLikeSymbol>,
                    @Suppress("USELESS_CAST") // K2 warning suppression, TODO: KT-62472
                    argumentMappingWithoutExtensionReceiver

- [`KT-43936`](https://youtrack.jetbrains.com/issue/KT-43936) Recursion detected on input: ANNOTATION_ENTRY with annotation on star-imported nested class
- [`KT-43846`](https://youtrack.jetbrains.com/issue/KT-43846) No smart cast when returning function closures with captured smart-cast variable

            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.CAST_NEVER_SUCCEEDS) { firDiagnostic ->
        CastNeverSucceedsImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.USELESS_CAST) { firDiagnostic ->
        UselessCastImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,

    inline fun <reified S : To> cache(key: From, calculation: () -> S): S {
        val value = cache.getOrPut(key, calculation)
        return value as? S
            ?: errorWithAttachment("Cannot cast ${value::class} to ${S::class}") {
                withEntry("value", value.toString())
            }
    }
}

internal fun FirElement.buildSymbol(builder: KtSymbolByFirBuilder) =

            val dependencyFiles = buildSet {
                addAll(compilationPeerData.files)
                addAll(codeFragmentMappings?.capturedFiles.orEmpty())

                // The main file needs to be the last so caches for the context declarations are populated in FIR-to-IR.
                remove(file)
            }

            addAll(dependencyFiles)
            add(file)
        }

        val candidateModule = candidateDeclaration.llFirModuleData.ktModule

        val effectiveSession = if (positionModule is KtDanglingFileModule && candidateModule != positionModule) {
            @Suppress("USELESS_CAST") // Smart cast is only available in K2
            val contextModule = (positionModule as KtDanglingFileModule).contextModule
            firResolveSession.getSessionFor(contextModule)
        } else {