code: def _load(self, **kwargs):
          
  
          if self._check_existence_by_collection(
                  self._meta_data['container'], kwargs['name']):
              return super(Rules, self)._load(**kwargs)
          msg = 'The rule named, {}, does not exist on the device.'.format(
              kwargs['name'])
          raise NonExtantPolicyRule(msg)
docs: Must check if rule actually exists before proceeding with load.