message: Use the same way in MapExternalFile and GetFileContent to determine if ExternalFile provides an inlined file via the file_content field. This increases consistency.
diff: @@ -171,7 +171,7 @@ absl::Status ExternalFileHandler::MapExternalFile() {
  }
  absl::string_view ExternalFileHandler::GetFileContent() {
  - if (external_file_.has_file_content()) {
  + if (!external_file_.file_content().empty()) {
  return external_file_.file_content();
  } else {
  return absl::string_view(static_cast<const char*>(buffer_) +
  