code: def create_vehicle_icon(self, name, colour, follow=False, vehicle_type=None):
          '''add a vehicle to the map'''
          from MAVProxy.modules.mavproxy_map import mp_slipmap
          if vehicle_type is None:
              vehicle_type = self.vehicle_type_name
          if name in self.have_vehicle and self.have_vehicle[name] == vehicle_type:
              return
          self.have_vehicle[name] = vehicle_type
          icon = self.mpstate.map.icon(colour + vehicle_type + '.png')
          self.mpstate.map.add_object(mp_slipmap.SlipIcon(name, (0,0), icon, layer=3, rotation=0, follow=follow,
                                                     trail=mp_slipmap.SlipTrail())f create_vehicle_icon(self, name, colour, follow=False, vehicle_type=None):
          '''add a vehicle to the map'''
          from MAVProxy.modules.mavproxy_map import mp_slipmap
          if vehicle_type is None:
              vehicle_type = self.vehicle_type_name
          if name in self.have_vehicle and self.have_vehicle[name] == vehicle_type:
              return
          self.have_vehicle[name] = vehicle_type
          icon = self.mpstate.map.icon(colour + vehicle_type + '.png')
          self.mpstate.map.add_object(mp_slipmap.SlipIcon(name, (0,0), icon, layer=3, rotation=0, follow=follow,
                                                     trail=mp_slipmap.SlipTrail()))
docs: add a vehicle to the map