vehicleWidget.onRemoveItem.connect(this, "onRemoveVehicle(List)");
addVehicleButton.clicked.connect(this, "onAddVehicleButton()");
QBoxLayout vehicleButtonBox = new QBoxLayout(Direction.TopToBottom);
vehicleButtonBox.addWidget(addVehicleButton);
vehicleButtonBox.addWidget(deleteVehicleButton);
gridLayout
.addItem(vehicleButtonBox, 3, 1, 1, 1, AlignmentFlag.AlignTop);
gridLayout.setColumnStretch(0, 5);
gridLayout.setColumnStretch(1, 1);
resultWidget.setLayout(gridLayout);