code: def parse_chained(self, args=None):
          
          kws = vars(self.parse_args(args))
          return self._parse2subparser_funcs(kws)
docs: Parse the argument directly to the function used for setup
  
          This function parses the command line arguments to the function that
          has been used for the :meth:`setup_args`.
  
  
          Parameters
          ----------
          args: list
              The arguments parsed to the :meth:`parse_args` function
  
          Returns
          -------
          argparse.Namespace
              The namespace with mapping from command name to the function
              return
  
          See also
          --------
          parse_known_chained