onSendOffer method
Implementation
@override
void onSendOffer(int userId, RTCSessionDescription sdp) async {
logTime("onSendOffer", _TAG);
try {
await _signaler.sendOffer(
sdp, sessionDescription.conferenceType, userId == publisherId);
} on WsException catch (ex) {
logTime("onSendOffer error: = $ex");
notifySessionError(ex);
}
}