code: def _merge_defaults(self, data: dict) -> dict:
          
          log.debug("merging defaults %s into data %s", self.defaults, data)
          return merge_dicts(data, self.defaults)
docs: Convenience method that calls :func:`~notifiers.utils.helpers.merge_dicts` in order to merge
          default values
  
          :param data: Notification data
          :return: A merged dict of provided data with added defaults