However, I am able to save the overlay only when I change/add some element in the BPMN Diagram, which means, the new XML for overlays is generated only after
eventBus.on('elements.changed') occurs. It seems that my overlay does not get listened by that
Is there a listener event that makes the modeler aware that something changed? not only with the bpmn-js Elements but also with Overlays which is my use case?