Method animate_

third_party/subscriptions-project/swg.js:12005–12014

* @param {function():!Promise} callback * @return {!Promise} * @private

(callback)

   * @private
   */
  animate_(callback) {
    const wait = this.animating_ || Promise.resolve();
    return (this.animating_ = wait
      .then(() => callback())
      // Ignore errors to make sure animations don't get stuck.
      .catch(() => {})
      .then(() => {
        this.animating_ = null;
      }));
  }

  /**
   * Closes the toast.