docs: protected void firePeerConnected(URI peerURI, SpaceID space) {
          final NetworkServiceListener[] ilisteners;
          synchronized (this.listeners) {
              ilisteners = new NetworkServiceListener[this.listeners.size()];
              this.listeners.toArray(ilisteners);
          }
          for (final NetworkServiceListener listener : ilisteners) {
              listener.peerConnected(peerURI, space);
          }
      }