docs: def received(self):
          """
          A :class:`~charms.reactive.endpoints.JSONUnitDataView` of the data
          received from this remote unit over the relation, with values being
          automatically decoded as JSON.
          """
          if self._data is None:
              self._data = JSONUnitDataView(hookenv.relation_get(
                  unit=self.unit_name,
                  rid=self.relation.relation_id))
          return self._data