code: async def query_power_state(self):
          
          power_data = await self._handler.query_power_state(
              system_id=self.system_id)
          # Update the internal state of this object as well, since we have the
          # updated power state from the BMC directly. MAAS server does this as
          # well, just do it client side to make it nice for a developer.
          self._data['power_state'] = power_data['state']
          return PowerState(power_data['state'])
docs: Query the machine's BMC for the current power state.
  
          :returns: Current power state.
          :rtype: `PowerState`