code: async def async_set_state(self, data):
          
          field = self.deconz_id + '/action'
          await self._async_set_state_callback(field, data)
          self.async_update({'state': data})
docs: Set state of light group.
  
          {
              "on": true,
              "bri": 180,
              "hue": 43680,
              "sat": 255,
              "transitiontime": 10
          }
  
          Also update local values of group since websockets doesn't.