code: def declare(self, name, text='', doc=None, attrs=None, attr_docs=None):
          
  
          self._defaults[name] = rules.Rule(name, text, attrs)
          self._docs[name] = rules.RuleDoc(name, doc, attr_docs)
  
          return self._defaults[name]
docs: Declare a rule.  This allows a default for a given rule to be
          set, along with default values for the authorization
          attributes.  This function can also include documentation for
          the rule and the authorization attributes, allowing a sample
          policy configuration file to be generated.
  
          :param name: The name of the rule.
          :param text: The text of the rule.  Defaults to the empty
                       string.
          :param doc: A string documenting the purpose of the rule.
          :param attrs: A dictionary of default values for the
                        authorization attributes.  Note that
                        authorization attributes cannot have names
                        beginning with an underscore ("_").
          :param attr_docs: A dictionary of strings for documenting the
                            purpose of the authorization attributes.