/**
* Adds <tt>WebRtcDataStreamListener</tt> to the list of listeners.
*
* @param listener the <tt>WebRtcDataStreamListener</tt> to be added to the listeners list.
*/
public void addChannelListener(WebRtcDataStreamListener listener) {
if (listener == null) {
throw new NullPointerException("listener");
} else {
synchronized (listeners) {
if (!listeners.contains(listener)) {
listeners.add(listener);
}
}
}
}
