public static function allow_assets_override($bool)
	{
    if($bool) {
      DataObject::add_extension("Folder","AssetManagerFolder");
      SortableDataObject::add_sortable_class("File");
    }
    else
      DataObject::remove_extension("Folder","AssetManagerFolder");
	}
 public function tearDownOnce()
 {
     DataObject::remove_extension('SiteTree', 'SolrIndexable');
     parent::tearDownOnce();
 }