code: def set_tracking_id(self, data, clear=False):
          
          self.assert_writeable()
          self._add_attributes(self.global_key + 'tracking_id', data, clear)
          return
docs: Add tracking-id data to the tracking_id group.
          
          :param data: A dictionary of key/value pairs. Keys must be strings.
              Values can be strings or numeric values.
          :param clear: If set, any existing tracking-id data will be removed.