else -> {
                if (isDynamic()) {
                    return KtSymbolOrigin.JS_DYNAMIC
                }
            }
        }
    }

    val sourceElement = this.toSourceElement
    if (sourceElement is JavaSourceElement) {
        return KtSymbolOrigin.JAVA
    }

    val psi = sourceElement.getPsi()
    if (psi != null) {
        if (psi.language != KotlinLanguage.INSTANCE) {

        if (this === other) return true
        if (javaClass != other?.javaClass) return false

        other as KtFe10FunctionLikeSignature<*>

        if (backingSymbol != other.backingSymbol) return false
        if (backingReturnType != other.backingReturnType) return false
        if (backingReceiverType != other.backingReceiverType) return false

    override val token: KtLifetimeToken
        get() = analysisSession.token

    override fun getResolveExtensionScopeWithTopLevelDeclarations(): KtScope {
        val tools = analysisSession.extensionTools
        if (tools.isEmpty()) return KtEmptyScope(token)
        return KtFirResolveExtensionScope(analysisSession, tools)
    }

    @OptIn(KtModuleStructureInternals::class)

    override val typeParameters: List<KtTypeParameterSymbol>
        get() = withValidityAssertion {
            descriptor.typeParameters.mapNotNull {
                if (it.containingDeclaration != descriptor) return@mapNotNull null
                KtFe10DescTypeParameterSymbol(it, analysisContext)
            }
        }

    override val name: Name
        get() = withValidityAssertion { descriptor.name }

    // There doesn't seem to be a way to determine if `descriptor` has a body or not, so we return an initializer even for enum entries
    // without a body.
    override val enumEntryInitializer: KtEnumEntryInitializerSymbol?
        get() = this

    private fun findReceiverFirExpression(receiverExpression: KtExpression): FirExpression? {
        if (receiverExpression is KtStatementExpression) {
            // FIR for 'KtStatementExpression' is not a 'FirExpression'
            return null
        }

        val parentCall = receiverExpression.getQualifiedExpressionForReceiver()
        if (parentCall !is KtSafeQualifiedExpression) {

            buildSet {
                // Add an empty scope to the shadowed set to give GlobalSearchScope.union something
                // to work with if there are no extension tools.
                // If there are extension tools, any empty scopes, whether from shadowedSearchScope
                // on the extension tools or from this add() call, will be ignored.

        KtPsiBasedSymbolPointer.createForSymbolFromSource<KtSamConstructorSymbol>(this)?.let {
            return it
        }

        val classId = descriptor.baseDescriptorForSynthetic.classId
        if (classId != null) {
            return KtFe10DescSamConstructorSymbolPointer(classId)
        }

        return KtFe10NeverRestoringSymbolPointer()
    }

    override fun equals(other: Any?): Boolean = isEqualTo(other)

        get() = withValidityAssertion { descriptor?.returnType?.toKtType(analysisContext) ?: createErrorType() }

    override val receiverParameter: KtReceiverParameterSymbol?
        get() = withValidityAssertion {
            if (!propertyPsi.isExtensionDeclaration()) {
                return null
            }

            descriptor?.extensionReceiverParameter?.toKtReceiverParameterSymbol(analysisContext)
        }

        get() = withValidityAssertion { descriptor?.returnType?.toKtType(analysisContext) ?: createErrorType() }

    override val receiverParameter: KtReceiverParameterSymbol?
        get() = withValidityAssertion {
            if (!psi.isExtensionDeclaration()) {
                return null
            }

            return descriptor?.extensionReceiverParameter?.toKtReceiverParameterSymbol(analysisContext)
        }