code: def argument_group(group, **kwargs):
      
  
      def decorator(func):
          adaptor = ScriptAdaptor._get_adaptor(func)
          adaptor._add_group(group, 'group', kwargs)
          return func
      return decorator
docs: Decorator used to specify an argument group.  Keyword arguments
      have the same meaning as those given to
      ``argparse.ArgumentParser.add_argument_group()``.
  
      Arguments may be placed in a given argument group by passing the
      ``group`` keyword argument to @argument().
  
      :param group: The name of the argument group.