public JComponent createComponent() {
    myList = new JBList<>(getListModel());
    myList.setCellRenderer(createListCellRenderer(myList));
    TreeUIHelper.getInstance().installListSpeedSearch(myList, VirtualFile::getPresentableUrl);

    ToolbarDecorator toolbarDecorator = ToolbarDecorator.createDecorator(myList)
      .disableUpDownActions()
      .setAddActionUpdater(e -> myEnabled)
      .setRemoveActionUpdater(e -> isRemoveActionEnabled(getSelectedRoots()))
      .setAddAction(button -> {
        final VirtualFile[] added = doAddItems();
        if (added.length > 0) {
          setModified(true);
        }
        requestDefaultFocus();
        setSelectedRoots(added);
      })
      .setRemoveAction(button -> {
        int[] indices = myList.getSelectedIndices();
        doRemoveItems(indices, myList);
      });

    addToolbarButtons(toolbarDecorator);

    myPanel = toolbarDecorator.createPanel();
    myPanel.setBorder(null);

    return myPanel;
  }
public JComponent createComponent()