code: @Override
    public void setupEventHandlers() {
      editableSpinner.getEditor().setOnKeyPressed(event -> {
        switch (event.getCode()) {
          case UP:
            editableSpinner.increment(1);
            break;
          case DOWN:
            editableSpinner.decrement(1);
            break;
          default:
        }
      });
    }
docs: {@inheritDoc}