Parses the message from a Demo object.
The tick that this message was sent on.
Index of the player that this message belongs to.
Callback function index:
-1 - list of registered callback functions;0 - RadialMenuMouseCallback, also hijacked by SAR to inject timer data.Optionalcursor2D vector containing radial menu cursor coordinates,
available only if the callback is RadialMenuMouseCallback.
OptionaldataRaw data buffer, available if the callback is not RadialMenuMouseCallback.
Arbitrary custom data. Used by the co-op radial menu, and by plugins like SAR.