Method addLabels

third_party/subscriptions-project/swg.js:7875–7885

* @param {!Array } labels

(labels)

   * @param {!Array<string>} labels
   */
  addLabels(labels) {
    if (labels && labels.length > 0) {
      const newLabels = [].concat(this.context_.getLabelList());
      for (const label of labels) {
        if (newLabels.indexOf(label) == -1) {
          newLabels.push(label);
        }
      }
      this.context_.setLabelList(newLabels);
    }
  }

  /**
   * @return {!HTMLIFrameElement}