These functions have no documentation in the example plugin and is not implemented into the rust docs because of that.

> This needs to be implemented in both

# UpdateParams 
recording_playback_channel

# SceneApi
getCameraCurrentTimestamp
showHmdControllers
setForceFeedbackAngle

# GuiParams
inactiveCombo

# DrawParams
projMatrix
viewportX
viewportY
viewportHeight
viewportWidth
targetHeight
targetWidth