src/main/java/com/github/oxo42/stateless4j/StateConfiguration.java
public StateConfiguration<S, T> onExit(final Action exitAction) {
        assert exitAction != null : EXIT_ACTION_IS_NULL;
        return onExit(new Action1<Transition<S, T>>() {
            @Override
            public void doIt(Transition<S, T> arg1) {
                exitAction.doIt();
            }
        });
    }
public StateConfiguration<S, T> onExit(final Action exitAction) {
        assert exitAction != null : EXIT_ACTION_IS_NULL;
        return onExit(new Action1<Transition<S, T>>() {
            @Override
            public void doIt(Transition<S, T> arg1) {
                exitAction.doIt();
            }
        });
    }
Specify an action that will execute when transitioning from the configured state

@param exitAction Action to execute
@return The receiver