421                                 Optional<StringRef> importModule,  in setImportAttributes()  argument
433   if (importModule) {  in setImportAttributes()
434     if (!existing->importModule)  in setImportAttributes()
435       existing->importModule = importModule;  in setImportAttributes()
436     if (existing->importModule != importModule)  in setImportAttributes()
438             "\n>>> defined as " + *existing->importModule + " in " +  in setImportAttributes()
440             *importModule + " in " + toString(file));  in setImportAttributes()
452                                           Optional<StringRef> importModule,  in addUndefinedFunction()  argument
469     replaceSymbol<UndefinedFunction>(s, name, importName, importModule, flags,  in addUndefinedFunction()
501       setImportAttributes(existingUndefined, importName, importModule, flags,  in addUndefinedFunction()
534                                         Optional<StringRef> importModule,  in addUndefinedGlobal()  argument
547     replaceSymbol<UndefinedGlobal>(s, name, importName, importModule, flags,  in addUndefinedGlobal()