public Object getItem() {
   if (myDelegate != null) {
     return myDelegate.getItem();
   } else {
     return null;
   }
 }
  @Override
  public void setPopupVisible(boolean visible) {
    if (!isSwingPopup()) {
      if (visible && (myJBPopup == null || myJBPopup.isDisposed())) {
        final JBList list = createJBList(getModel());
        myJBPopup =
            JBPopupFactory.getInstance()
                .createListPopupBuilder(list)
                .setItemChoosenCallback(
                    new Runnable() {
                      @Override
                      public void run() {
                        final Object value = list.getSelectedValue();
                        if (value != null) {
                          configureEditor(getEditor(), value);
                          IdeFocusManager.getGlobalInstance().requestFocus(ComboBox.this, true);
                          assert myJBPopup != null;
                          ComboBox.this.getUI().setPopupVisible(ComboBox.this, false);
                          myJBPopup.cancel();
                        }
                      }
                    })
                .setFocusOwners(new Component[] {this})
                .setMinSize(new Dimension(getWidth(), -1))
                .createPopup();
        list.setBorder(IdeBorderFactory.createEmptyBorder());
        myJBPopup.showUnderneathOf(this);
        list.addFocusListener(
            new FocusAdapter() {
              @Override
              public void focusLost(FocusEvent e) {
                ComboBox.this.getUI().setPopupVisible(ComboBox.this, false);
                myJBPopup.cancel();
              }
            });
      }
      return;
    }

    if (getModel().getSize() == 0 && visible) return;
    if (visible && JBPopupFactory.getInstance().getChildFocusedPopup(this) != null) return;

    final boolean wasShown = isPopupVisible();
    super.setPopupVisible(visible);
    if (!wasShown
        && visible
        && isEditable()
        && !UIManager.getBoolean("ComboBox.isEnterSelectablePopup")) {

      final ComboBoxEditor editor = getEditor();
      final Object item = editor.getItem();
      final Object selectedItem = getSelectedItem();
      if (isSwingPopup() && (item == null || item != selectedItem)) {
        configureEditor(editor, selectedItem);
      }
    }
  }