public static function resume($params)
 {
     try {
         $return = System::resume();
     } catch (Exception $e) {
         throw new RpcException($e->getMessage(), -31001);
     }
     return $return;
 }
 private function resume()
 {
     try {
         $pid = SourceSystem::resume();
     } catch (Exception $se) {
         throw $se;
     }
     return $this->color->convert("%gExtender resumed (pid " . $pid . ")%n") . "\n";
 }