private void closeTransaction() {
		DomainObject d = domainObject;
		if (d != null && currentGroupTransactionID != null) {
			d.endTransaction(currentGroupTransactionID, true);
			currentGroupTransactionID = null;
		}
	}
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