docs: def _to_dict(self):
          """Return a json dictionary representing this model."""
          _dict = {}
          if hasattr(self, 'document_id') and self.document_id is not None:
              _dict['document_id'] = self.document_id
          if hasattr(self, 'status') and self.status is not None:
              _dict['status'] = self.status
          if hasattr(self, 'notices') and self.notices is not None:
              _dict['notices'] = [x._to_dict() for x in self.notices]
          return _dict