code: def register_catchall_controlreq(self, callback, callback_parsed=None):
          
          if callback_parsed:
              callback = self._get_parsed_control_callback(callback_parsed, callback)
          return self.__client.register_callback_controlreq(callback)
docs: Registers a callback that is called for all control requests received by your Thing
  
          `Example`
  
              #!python
              def controlreq_callback(data):
                  print(data)
              ...
              client.register_catchall_controlreq(controlreq_callback)
  
          `callback` (required) the function name that you want to be called on receipt of a new control request
  
  
          `callback_parsed` (optional) (function reference) callback function to invoke on receipt of a control ask/tell.
          This is equivalent to `callback` except the dict includes the `parsed` key which holds the set of values in a
          [PointDataObject](./Point.m.html#IoticAgent.IOT.Point.PointDataObject) instance. If both `callback_parsed` and
          `callback` have been specified, the former takes precedence and `callback` is only called if the point data
          could not be parsed according to its current value description.
  
          More details on the contents of the `data` dictionary for controls see:
          [create_control()](./Thing.m.html#IoticAgent.IOT.Thing.Thing.create_control)