setup method
Method to setup the VideoTrack event listeners on a TextTrack list (VideoTracks).
Implementation
void setup(VideoTracks trackListToWrap) {
_wrappedTrackList = trackListToWrap;
innerList = trackListToWrap;
_wrappedTrackList?.addEventListener(VideoTracksEventTypes.ADDTRACK, forwardingkEventListener);
_wrappedTrackList?.addEventListener(VideoTracksEventTypes.REMOVETRACK, forwardingkEventListener);
_wrappedTrackList?.addEventListener(VideoTracksEventTypes.CHANGE, forwardingkEventListener);
}