Method purge

src/service/task-queue.js:151–158

* Removes tasks in queue that pass the callback test. * @param {function(!TaskDef):boolean} callback Return true to remove the task.

(callback)

   * @param {function(!TaskDef):boolean} callback Return true to remove the task.
   */
  purge(callback) {
    let index = this.tasks_.length;
    while (index--) {
      if (callback(this.tasks_[index])) {
        this.removeAtIndex(this.tasks_[index], index);
      }
    }
  }
}