docs: public boolean removeBusLine(int index) {
  		try {
  			final BusLine busLine = this.busLines.remove(index);
  			busLine.setContainer(null);
  			busLine.setEventFirable(true);
  			fireShapeChanged(new BusChangeEvent(this,
  					BusChangeEventType.LINE_REMOVED,
  					busLine,
  					index,
  					"shape", //$NON-NLS-1$
  					null,
  					null));
  			checkPrimitiveValidity();
  			return true;
  		} catch (Throwable exception) {
  			//
  		}
  		return false;
  	}