public function filesAction($route, $key = 'id')
{
$rowAction = new RowAction('<i class="fa fa-files-o"></i>', $route);
$rowAction->setAttributes(['class' => 'btn btn-primary btn-xs ', 'data-toggle' => 'tooltip', 'title' => $this->translator->trans('title.issue_files')]);
$rowAction->setRouteParameters($key);
$rowAction->setRouteParametersMapping(['id' => 'issueId']);
return $rowAction;
}