@Override
		public void progressModeChanged(long id, I item, boolean indeterminate) {
			listener1.progressModeChanged(id, item, indeterminate);
			listener2.progressModeChanged(id, item, indeterminate);
		}
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