rresponding to
       * properties referenced in template bindings.
       *
       * @param {Object=} model Object containing initial property values to
       *   populate into the template bindings.
       * @return {TemplateInstanceBase} Returns the created instance of
       * the template prepared by `templatize`.
       */
      stamp(model) {
        return new this.ctor(model);
      },

      /**
       * Returns the template "model" (`TemplateInstance`) associated with
       * a given element, w