protected override object GetExtender(string name) { var type = TypeSymbol; if (type == null) { throw Exceptions.ThrowEUnexpected(); } var assembly = type.ContainingAssembly; if (assembly == null) { return(string.Empty); } var compilation = GetCompilation(); if (!(compilation.GetMetadataReference(assembly) is PortableExecutableReference metadataReference)) { return(string.Empty); } return(CodeModelService.GetExternalTypeExtender(name, metadataReference.FilePath)); }