code: def _quick_help(self, nested=False):
          
          if nested:
              return self.command_path(), None, self.help_msg
          else:
              return self.command_path(), self.param_help_msg, self.help_msg
docs: :param nested: True if help is requested directly for this command
                      and False when help is requested for a list of possible
                      completions.