docs: def on_electrode_states_updated(self, states):
          '''
          .. versionchanged:: 0.12
              Refactor to use :meth:`on_electrode_states_set`.
          '''
          states['electrode_states'] = \
              states['electrode_states'].combine_first(self.canvas_slave
                                                       .electrode_states)
          self.on_electrode_states_set(states)