code: public static synchronized void putChannelGroup(WonderPushChannelGroup channelGroup) {
          try {
              if (_putChannelGroup(channelGroup)) {
                  save();
              }
          } catch (Exception ex) {
              Log.e(WonderPush.TAG, "Unexpected error while putting channel group " + channelGroup, ex);
          }
      }
docs: Create or update a channel group.
  
  <p>Creates or updates a channel group both in this class registry and in Android.</p>
  
  @param channelGroup The channel group to create or update.