What is the structure of the packet?

[TAGood827]

I apologize if this is the wrong place to ask. I am new to using the IBus protocol on my FlySky I6X transmitter with IA6B receiver. I understand that there are 6 servo channels transmitted (the two gimbals and VRa and VRb, correct?) There are also 4 switches on the transmitter, are they included in the packet? Is there a full definition of the entire packet somewhere? I have been looking but I cannot find a definition of the full packet.

[chupocro]

The example packet which has 14 channels is here in the source code. There is a transmitter menu where you can assign switches to additional channels or to the channels used by the potentiometers. FS-I6X has 10 channels.