private synchronized void doWait() {
		try {
			lock.unlock();
			wait();
			lock.lock();
		}
		catch (InterruptedException e) {
			// ignore
		}
	}
Cancels all scheduled groups and tasks. The TaskMonitor for
the currently running task will be cancelled, but the task will continue to run until it
checks the monitor.
Ghidra/Framework/Project/src/main/java/ghidra/framework/task/GTaskManager.java