private function activate_plugin()
 {
     $lca = 'wpssojson';
     $version = WpssoJsonConfig::$cf['plugin'][$lca]['version'];
     // only our config
     if (class_exists('WpssoUtil')) {
         WpssoUtil::save_all_times($lca, $version);
     } else {
         WpssoJson::required_notice(true);
     }
     // $deactivate = true
 }