Function UnimplementedStrCat

tensorflow/compiler/xla/util.h:308–310

template <typename... Args>
Status UnimplementedStrCat(Args&&... concat) {
  return Unimplemented("%s", absl::StrCat(std::forward<Args>(concat)...));
}

template <typename... Args>
Status InternalErrorStrCat(Args&&... concat) {