code: public boolean removeBusLine(BusLine busLine) {
  		final int index = this.busLines.indexOf(busLine);
  		if (index >= 0) {
  			return removeBusLine(index);
  		}
  		return false;
  	}
docs: Remove a bus line from this network.
  All the itineraries and the associated stops will be removed also.
  If this bus line removal implies empty hubs, these hubs
  will be also removed.
  
  @param busLine is the bus line to remove.
  @return <code>true</code> if the bus line was successfully removed, otherwise <code>false</code>