d, but it's guaranteed
          // to not be since this is a vanilla template we just added effects to
          Object.assign(template.__data, template.__dataProto);
        }
        // Clear any pending data for performance
        template.__dataTemp = {};
        template.__dataPending = null;
        template.__dataOld = null;
        template._enableProperties();
      }
    }

    function createForwardHostPropEffect(hostProp, userForwardHostProp) {
      return function forwardHostProp(template, p