code: protected synchronized void fireConnectionChangeEvent(boolean isConnected) {
          ConnectionChangeEvent cce = new ConnectionChangeEvent(this, isConnected);
  
          for (ConnectionChangeListener ccl : connectionListeners) {
              ccl.connectionChangeEventReceived(cce);
          }
      }
docs: Sends the appropriate {@link org.bff.javampd.server.ConnectionChangeEvent} to all registered
  {@link ConnectionChangeListener}s.
  
  @param isConnected the connection status