docs: def is_valid_pid_to_be_updated(did):
      """Return True if ``did`` is the PID of an object that can be updated (obsoleted)
      with MNStorage.update()"""
      return (
          is_existing_object(did)
          and not is_local_replica(did)
          and not is_archived(did)
          and not is_obsoleted(did)
      )