code: def _handle_help(self, env, args):
          
  
          if args:
              # command help (focus help [command])
              # get command plugin registered for command
              active = env.task.active
              plugin_obj = registration.get_command_hook(args[0], active)
  
              if plugin_obj:
                  parser = self._get_plugin_parser(plugin_obj)
                  raise HelpBanner(parser.format_help(), code=0)
  
          return False
docs: Handles showing help information for arguments provided.
  
              `env`
                  Runtime ``Environment`` instance.
              `args`
                  List of argument strings passed.
  
              Returns ``False`` if nothing handled.
  
              * Raises ``HelpBanner`` exception if valid subcommand provided.