How to use the ipyleaflet.leaflet.ControlException function in ipyleaflet

def add_control(self, control):
        if control.model_id in self._control_ids:
            raise ControlException('control already on map: %r' % control)
        self.controls = tuple([c for c in self.controls] + [control])

def _validate_controls(self, proposal):
        '''Validate controls list.

        Makes sure only one instance of any given layer can exist in the
        controls list.
        '''
        self._control_ids = [c.model_id for c in proposal.value]
        if len(set(self._control_ids)) != len(self._control_ids):
            raise ControlException('duplicate control detected, only use each control once')
        return proposal.value

def remove_control(self, control):
        if control.model_id not in self._control_ids:
            raise ControlException('control not on map: %r' % control)
        self.controls = tuple([c for c in self.controls if c.model_id != control.model_id])