protected function _getPageLoadInfoInstance($oProp, $oMsg)
 {
     switch ($oProp->sFieldsType) {
         case 'page':
             return AdminPageFramework_PageLoadInfo_Page::instantiate($oProp, $oMsg);
         case 'network_admin_page':
             return AdminPageFramework_PageLoadInfo_NetworkAdminPage::instantiate($oProp, $oMsg);
         case 'post_meta_box':
             return null;
         case 'page_meta_box':
             return null;
         case 'post_type':
             return AdminPageFramework_PageLoadInfo_PostType::instantiate($oProp, $oMsg);
         case 'taxonomy':
         case 'widget':
         default:
             return null;
     }
 }