code: def registered_filters_list(self):
          
          return [filter_name for filter_name in self.__jinja2_environment.filters.keys() if filter_name not in self.__jinja2_predefined_filters ]
docs: Return the list of registered filters (as a list of strings).
  
          The list **only** includes registered filters (**not** the predefined :program:`Jinja2` filters).