code: void zApplyDisplaySpinnerButtons() {
          if (parent == null) {
              return;
          }
          parent.getComponentDecreaseSpinnerButton().setEnabled(displaySpinnerButtons);
          parent.getComponentDecreaseSpinnerButton().setVisible(displaySpinnerButtons);
          parent.getComponentIncreaseSpinnerButton().setEnabled(displaySpinnerButtons);
          parent.getComponentIncreaseSpinnerButton().setVisible(displaySpinnerButtons);
      }
docs: zApplyDisplaySpinnerButtons, This applies the specified setting to the time picker.