ia cooperation with our dataHost always setting
      // `_methodHost` as long as there were bindings (or id's) on this
      // instance causing it to get a dataHost.
      let templateHost = template.__dataHost;
      return templateHost && templateHost._methodHost || templateHost;
    }

    function createTemplatizerClass(template, templateInfo, options) {
      // Anonymous class created by the templatize
      /**
       * @unrestricted
       */
      let base = options.mutableData ?
        MutableT