iOS SDK / API, Missing Notifications for WebRTC

Hello, 

I want to build a iOS App for WebRTC Calls.
But when i follow the Documentation i have the different Observers. But this are not working. 

// Register for Notifications ..

[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(didCallSuccess:) name:kRTCServiceDidAddCallNotification object:nil];
 
[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(didUpdateCall:) name:kRTCServiceDidUpdateCallNotification object:nil];
        
[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(statusChanged:) name:kRTCServiceCallStatsNotification object:nil];
        
[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(didRemoveCall:) name:kRTCServiceDidRemoveCallNotification object:nil];
        
[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(didAllowMicrophone:) name:kRTCServiceDidAllowMicrophoneNotification object:nil];
        
[[NSNotificationCenter defaultCenter] addObserver:viewController selector:@selector(didRefuseMicrophone:) name:kRTCServiceDidRefuseMicrophoneNotification object:nil]; 

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didAddLocalVideoTrack:) name:kRTCServiceDidAddLocalVideoTrackNotification object:nil];  

When i check the API Documentation no Constants are available for this Notifications?? 
When i search in the API Documentation no RTC Manager are available? Only RTC Service!
When i check the RTC Service the only Available Notification is...

RTC service available notifications

• kRTCServiceCallStatsNotification: notification sent when new statistics are available

you can explain it to me?
Thanks