@Override
		public void progressChanged(long id, I Item, long currentProgress) {
			listener1.progressChanged(id, Item, currentProgress);
			listener2.progressChanged(id, Item, currentProgress);
		}
Cancels all running tasks and disposes of the internal thread pool if it is a private
pool.
Ghidra/Framework/Generic/src/main/java/generic/concurrent/ConcurrentQ.java