protected void runQueuedTasks() {
        AppTask<?> task;
        while ((task = taskQueue.poll()) != null) {
            if (!task.isCancelled()) {
                task.invoke();
            }
        }
    }
Runs tasks enqueued via {@link #enqueue(Callable)}
jme3-core/src/main/java/com/jme3/app/LegacyApplication.java