Record UI elements for TestFX

[Akos]

There is an existing JavaFX based application, which I should write automated tests for. I just started to use TestFX(version 4.0.13-alpha) and looking for advice, how to record and identify UI objects of application. I tried following code to initialize a button, but it couldn't be clicked.

Button button = new Button("click me!");

I found these GUI inspect tools, but not sure, which one could works with TestFX.