Method whenBuilt

src/service/resource.js:313–316

* Returns promise that resolves when the element has been built. * @return {!Promise}

()

   * @return {!Promise}
   */
  whenBuilt() {
    // TODO(dvoytenko): merge with the standard BUILT signal.
    return this.element.signals().whenSignal('res-built');
  }

  /**
   * Requests the resource's element to be built. See {@link AmpElement.build}