): KtCompletionExtensionCandidateChecker = analysisSession.withValidityAssertion {
        return LazyKtCompletionExtensionCandidateChecker {
            // Double validity check is needed, as the checker may be requested some time later
            analysisSession.withValidityAssertion {
                KtFirCompletionExtensionCandidateChecker(analysisSession, nameExpression, explicitReceiver, originalFile)
            }
        }
    }

     *       }
     *     }
     *   }
     */
    private enum class PartialOrderOfScope(
        val scopeDistanceLevel: Int // Note: Don't use the built-in ordinal since there are some scopes that are at the same level.
    ) {
        Local(1),
        ScriptDeclarations(2),
        ClassUseSite(2),
        NestedClassifier(2),
        TypeParameter(2),
        ExplicitSimpleImporting(3),

Welcome to [Kotlin](https://kotlinlang.org/)!   
It is an open-source, statically typed programming language supported and developed by [JetBrains](https://www.jetbrains.com/) and open-source contributors.

Some handy links:

 * [Kotlin Site](https://kotlinlang.org/)
 * [Getting Started Guide](https://kotlinlang.org/docs/tutorials/getting-started.html)
 * [Try Kotlin](https://play.kotlinlang.org/)

    ): List<KtSymbol> {
        // Handle situation when we're in the middle/beginning of qualifier
        // <caret>A.B.C.foo() or A.<caret>B.C.foo()
        // NB: in this case we get some parent FIR, like FirBlock, FirProperty, FirFunction or the like
        var parent = expression.parent as? KtDotQualifiedExpression
        var unresolvedCounter = 1
        while (parent != null) {

    if (analysisContext.builtIns.areSameArrayTypeIgnoringProjections(containingArrayType, constantType)) {
        // If an element in the array has the same type as the containing array, it's a spread component that needs
        // to be expanded here. (It should have the array element type instead.)

        val extensionReceiverType = symbol.receiverParameter?.type ?: return false
        return isPossiblySuperTypeOf(extensionReceiverType, actualReceiverType)
    }

    /**
     * Same constraints as in [canBeReferencedAsExtensionOn].
     *
     * For a similar function in the `intellij` repository, see `isPossiblySubTypeOf`.
     */

    private fun findControlFlowGraph(anchor: KtElement, firStatements: List<FirElement>): ControlFlowGraph? {
        /**
         * Not all expressions appear in the [ControlFlowGraph].
         * Still, if we find at least some of them, it's very unlikely that we will ever find a better graph.
         */
        val firCandidates = buildSet {
            fun addCandidate(firCandidate: FirElement) {
                add(firCandidate)

                                    this += classFqName
                                }
                            } else if (fqName != qualifiedNameAsFqName) {
                                // or some kind of top level declaration with potential receiver
                                this += fqName
                                val receiverClassType = symbol.receiverParameter?.type as? KtNonErrorClassType

            ) {
                return null
            }
        }
        return binaryExpression
    }

    /**
     * For prefix and postfix `++` and `--`, the idea is the same because FIR represents it as several operations. For example, for `i++`,
     * if the input PSI is `i`, we instead resolve `i++` and extract the read part of this access for `i`.
     */

                firSymbolBuilder.buildSymbol(firBasedSymbol)
            },
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE) { firDiagnostic ->
        ExpectAndActualInTheSameModuleImpl(
            firSymbolBuilder.buildSymbol(firDiagnostic.a),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }