docs: def last_updated(self):
          """
          The date and time when `vcs-repo-mgr` last checked for updates (an integer).
  
          Used internally by :func:`pull()` when used in combination with
          :class:`limit_vcs_updates`. The value is a UNIX time stamp (0 for
          remote repositories that don't have a local clone yet).
          """
          try:
              if self.context.exists(self.last_updated_file):
                  return int(self.context.read_file(self.last_updated_file))
          except Exception:
              pass
          return 0