Usage of ActionHandler in FlowHandler class

[KilianB]

How are the private fields of the class FlowHandler

private SimpleObjectProperty<BeforeFlowActionHandler> beforeFlowActionHandler;
private SimpleObjectProperty<AfterFlowActionHandler> afterFlowActionHandler;
private SimpleObjectProperty<VetoableBeforeFlowActionHandler> vetoableBeforeFlowActionHandler;
private SimpleObjectProperty<VetoHandler> vetoHandler;

populated and used in datafx? I would like to fire an event after a flow has taken place having access to the actionId.
Are they accessed via reflection or just idle at the moment? Any chance we get some getters/setters?