code: def cmd_msg(self, args):
          '''control behaviour of the module'''
          if len(args) == 0:
              print(self.usage())
          txt = ' '.join(args)
          self.master.mav.statustext_send(mavutil.mavlink.MAV_SEVERITY_NOTICE,
                                          txtf cmd_msg(self, args):
          '''control behaviour of the module'''
          if len(args) == 0:
              print(self.usage())
          txt = ' '.join(args)
          self.master.mav.statustext_send(mavutil.mavlink.MAV_SEVERITY_NOTICE,
                                          txt)
docs: control behaviour of the module