private boolean performHoverAction() {
      ChangesBrowserNode<?> selected = VcsTreeModelData.selected(myView).iterateNodes().single();
      if (selected == null) return false;

      for (ChangesViewNodeAction extension : ChangesViewNodeAction.EP_NAME.getExtensions(myProject)) {
        if (extension.handleDoubleClick(selected)) return true;
      }
      return false;
    }
private boolean performHoverAction()