docs: def _to_dict(self):
          """Return a json dictionary representing this model."""
          _dict = {}
          if hasattr(self, 'next_url') and self.next_url is not None:
              _dict['next_url'] = self.next_url
          if hasattr(self, 'matched') and self.matched is not None:
              _dict['matched'] = self.matched
          if hasattr(self, 'next_cursor') and self.next_cursor is not None:
              _dict['next_cursor'] = self.next_cursor
          return _dict