code: protected void fireFrameReceived(final CEMI frame)
  	{
  		final FrameEvent fe = new FrameEvent(this, frame);
  		listeners.fire(l -> l.frameReceived(fe));
  	}
docs: Fires a frame received event ({@link KNXListener#frameReceived(FrameEvent)}) for the supplied cEMI
  <code>frame</code>.
  
  @param frame the cEMI to generate the event for