code: def _find_playlist(self):
          
          data = None
          if self.id:
              data = self.connection.get_item(
                  'find_playlist_by_id', playlist_id=self.id)
          elif self.reference_id:
              data = self.connection.get_item(
                  'find_playlist_by_reference_id',
                  reference_id=self.reference_id)
  
          if data:
              self._load(data)
docs: Internal method to populate the object given the ``id`` or
          ``reference_id`` that has been set in the constructor.