Converts the data in the message to bytes placed in the message.
data is guaranteed to have enough space to fit the size returned by gio.socket_control_message.SocketControlMessage.getSize on this object.
A buffer to write data to
Converts the data in the message to bytes placed in the message.
data is guaranteed to have enough space to fit the size returned by gio.socket_control_message.SocketControlMessage.getSize on this object.