def groups_option(f):
    new_func = click.option("-g", "--groups",
                            help="Comma-separated list of requirement groups "
                            "to include.")(f)
    return update_wrapper(new_func, f)
def add_item(self, item_value=None, index=None):
    if item_value is None:
      item_value = self._new_item_default_value