docs: def celery_run(data_id, runtime_dir, argv):
      """Run process executor.
  
      :param data_id: The id of the :class:`~resolwe.flow.models.Data`
          object to be processed.
      :param runtime_dir: The directory from which to run the executor.
      :param argv: The argument vector used to run the executor.
      :param verbosity: The logging verbosity level.
      """
      subprocess.Popen(
          argv,
          cwd=runtime_dir,
          stdin=subprocess.DEVNULL
      ).wait()