private void addDialogActions() {
    toolbarDecorator.setEditAction(button -> {
      T item = table.getSelectedObject();
      if (item != null) {
        Function<T, T> mutator;
        if (helper.isMutable(item)) {
          mutator = FunctionUtil.id();
        }
        else {
          final int selectedRow = table.getSelectedRow();
          mutator = item12 -> helper.getMutable(item12, selectedRow);
        }
        ((DialogItemEditor<T>)itemEditor).edit(item, mutator, false);
        IdeFocusManager.getGlobalInstance().doWhenFocusSettlesDown(() -> IdeFocusManager.getGlobalInstance().requestFocus(table, true));
      }
    }).setEditActionUpdater(e -> {
      T item = table.getSelectedObject();
      return item != null && ((DialogItemEditor<T>)itemEditor).isEditable(item);
    });

    if (((DialogItemEditor<?>)itemEditor).isUseDialogToAdd()) {
      toolbarDecorator.setAddAction(button -> {
        T item = createElement();
        ((DialogItemEditor<T>)itemEditor).edit(item, item1 -> {
          model.addRow(item1);
          return item1;
        }, true);
      });
    }
  }
private void addDialogActions()