public static function createForum($forumName, $parentId = 0){
$dw = XenForo_DataWriter::create('XenForo_DataWriter_Forum');
$dw->set('title', $forumName);
$dw->set('node_type_id', 'Forum');
$dw->set('parent_node_id', $parentId);
$dw->save();
return $dw->getMergedData();
}