code: def _update_progress_bar(self, stdin=False):
          # type: (Uploader, bool) -> None
          
          if not self._all_files_processed:
              return
          blobxfer.operations.progress.update_progress_bar(
              self._general_options,
              'upload',
              self._upload_start_time,
              self._upload_total,
              self._upload_sofar,
              self._upload_bytes_total,
              self._upload_bytes_sofar,
              stdin_upload=stdin,
          )
docs: Update progress bar
          :param Uploader self: this
          :param bool stdin: stdin upload