code: public static void onProcessExited(Process process, Listener<Integer> exitValueListener) {
  		Application app = LCCore.getApplication();
  		Mutable<Thread> mt = new Mutable<>(null);
  		Thread t = app.getThreadFactory().newThread(() -> {
  			try { exitValueListener.fire(Integer.valueOf(process.waitFor())); }
  			catch (InterruptedException e) { /* ignore and quit */ }
  			app.interrupted(mt.get());
  		});
  		mt.set(t);
  		t.setName("Waiting for process to exit");
  		t.start();
  		app.toInterruptOnShutdown(t);
  	}
docs: Create a thread that wait for the given process to end, and call the given listener.