public void installSimple() {
    TreeSpeedSearch supply =
      new TreeSpeedSearch(myTree,
                          true,
                          null,
                          p -> StringUtil.notNullize(getText(p == null ? null : getUserObject((TreeNode)p.getLastPathComponent())))) {
        @Override
        protected void onSearchFieldUpdated(String pattern) {
          super.onSearchFieldUpdated(pattern);
          //constructor of popup
          if (StringUtil.isNotEmpty(pattern) && !isPopupActive()) {
            SwingUtilities.invokeLater(() -> {
              getSearchModel().refilter();
              if (StringUtil.isNotEmpty(pattern)) TreeUtil.expandAll(myTree);
            });
          }
          else {
            getSearchModel().refilter();
          }
        }
      };
    supply.setupListeners();
    getSearchModel().setSpeedSearch(supply);
  }
public void installSimple()