code: @Pure
  	public BusLine getBusLine(UUID uuid) {
  		if (uuid == null) {
  			return null;
  		}
  		for (final BusLine busLine : this.busLines) {
  			if (uuid.equals(busLine.getUUID())) {
  				return busLine;
  			}
  		}
  		return null;
  	}
docs: Replies the bus line with the specified uuid.
  
  @param uuid the identifier.
  @return BusLine or <code>null</code>