'This method is used to send raw MAVLink "custom messages" to the vehicle.
The function can send arbitrary messages/commands to the connected vehicle at any time and in any vehicle mode.
It is particularly useful for controlling vehicles outside of missions (for example, in GUIDED mode).
The :py:func:`message_factory <dronekit.Vehicle.message_factory>` is used to create messages in the appropriate format.
For more information see the guide topic: :ref:`guided_mode_how_to_send_commands`.
:param message: A ``MAVLink_message`` instance, created using :py:func:`message_factory <dronekit.Vehicle.message_factory>`.
There is need to specify the system id, component id or sequence number of messages as the API will set these appropriately.'

def send_mavlink(self, message):

    self._master.mav.send(message)
