``` python from jupyter_bokeh import BokehModel from bokeh.models import RadioGroup def update(event): print(event) LABELS = ["Option 1", "Option 2", "Option 3"] radio_group = RadioGroup(labels=LABELS, active=1) radio_group.on_click(update) BokehModel(radio_group) ``` After a click on "Option 3" it displays:  I would expect the event to be fired only once (in javascript it fires once).