@Override
		public void maxProgressChanged(long id, I item, long maxProgress) {
			listener1.maxProgressChanged(id, item, maxProgress);
			listener2.maxProgressChanged(id, item, maxProgress);
		}
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