Safety switch by Mavlink

Can I controll the safety switch of my copter through mavlink messages?
I looked through Ardupilot Params and saw there was a refference to get the state of the safety switch from through Mavlink but there was no Mavlink message to support that.

Yes. MAVProxy does this with “arm safetyoff”

For safety off:

master.mav.set_mode_send(master.target_system, mavutil.mavlink.MAV_MODE_FLAG_DECODE_POSITION_SAFETY, 0)

For safety on:

master.mav.set_mode_send(master.target_system, mavutil.mavlink.MAV_MODE_FLAG_DECODE_POSITION_SAFETY, 1)

would the dronekit equivalent for safety on be :

        msg = self.vehicle.message_factory.command_long_encode(0, 0, mavutil.mavlink.MAV_CMD_DO_SET_MODE, 0,
                                                              0b00000001, 0, 0, 0, 0, 0)