return buildSet {
            addAll(getCallableSymbols(shortName))
            addAll(getClassifierSymbols(shortName))
        }
    }

    /**
     * Tries to resolve [fqName] into available extension callables (functions or properties)
     * prefixed with a suitable extension receiver type (like in `Foo.bar`, or `foo.Foo.bar`).
     *

        PlatformClassMappedToKotlinImpl(
            firDiagnostic.a,
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION.errorFactory) { firDiagnostic ->
        InferredTypeVariableIntoEmptyIntersectionErrorImpl(
            firDiagnostic.a,
            firDiagnostic.b.map { coneKotlinType ->

                        // expression positions (e.g. `T` in `println(T)`) are parsed as `KtSimpleNameExpression` and built into
                        // `FirPropertyAccessExpression` (which is `FirResolvable`).
                        is FirCallableSymbol<*> -> {

        KtReadActionConfinementLifetimeToken.allowFromWriteAction.get() &&
        ApplicationManager.getApplication().isWriteAccessAllowed
    ) {
        // We must flush modifications to publish local modifications into FIR tree
        @OptIn(LLFirInternals::class)
        LLFirDeclarationModificationService.getInstance(project).flushModifications()
    }

            Errors.RESOLUTION_TO_PRIVATE_CONSTRUCTOR_OF_SEALED_CLASS,
            Errors.UNRESOLVED_REFERENCE,
            *Errors.TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM.factories,
            *Errors.TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM_IN_AUGMENTED_ASSIGNMENT.factories,
        )

        private val syntaxErrors = setOf(
            Errors.ASSIGNMENT_IN_EXPRESSION_CONTEXT,
        )