docs: def do_help(self, line):
          """Get help on commands "help" or "?" with no arguments displays a list_objects
          of commands for which help is available "help <command>" or "?
  
          <command>" gives help on <command>
  
          """
          command, = self._split_args(line, 0, 1)
          if command is None:
              return self._print_help()
          cmd.Cmd.do_help(self, line)