/**
  * Saves a config
  *
  * @uses "wp_ajax_plorg_save_config" hook
  *
  * @since 0.0.1
  */
 public function save_config()
 {
     if (empty($_POST['plugin-groups-setup']) || !wp_verify_nonce($_POST['plugin-groups-setup'], 'plugin-groups')) {
         if (empty($_POST['config'])) {
             return;
         }
     }
     if (!empty($_POST['plugin-groups-setup']) && empty($_POST['config'])) {
         $config = stripslashes_deep($_POST['config']);
         Plugin_Groups_Options::update($config);
         wp_redirect('?page=plugin_groups&updated=true');
         exit;
     }
     if (!empty($_POST['config'])) {
         $config = json_decode(stripslashes_deep($_POST['config']), true);
         if (wp_verify_nonce($config['plugin-groups-setup'], 'plugin-groups')) {
             Plugin_Groups_Options::update($config);
             wp_send_json_success($config);
         }
     }
     // nope
     wp_send_json_error($config);
 }