code: protected boolean onBusLineAdded(BusLine line, int index) {
  		if (this.autoUpdate.get()) {
  			try {
  				addMapLayer(index, new BusLineLayer(line, isLayerAutoUpdated()));
  				return true;
  			} catch (Throwable exception) {
  				//
  			}
  		}
  		return false;
  	}
docs: Invoked when a bus line was added in the attached network.
  
  <p>This function exists to allow be override to provide a specific behaviour
  when a bus line has been added.
  
  @param line is the new line.
  @param index is the index of the bus line.
  @return <code>true</code> if the events was fired, otherwise <code>false</code>.