public void StopSignalling(Action<string> callback)
 {
     Signalling.Stop(callback);
     Signalling = null;
 }
 public void StopSignalling(Action <string> callback)
 {
     Signalling.Stop(callback);
     Signalling = null;
 }
 public void StartSignalling(Action<string> callback)
 {
     Signalling = new Signalling(WebSyncServerUrl);
     Signalling.Start(callback);
 }
 public void StartSignalling(Action <string> callback)
 {
     Signalling = new Signalling(WebSyncServerUrl);
     Signalling.Start(callback);
 }