Add custom json data to modObjectGetListProcessor

gistfile1.txt

public function process() {
    $beforeQuery = $this->beforeQuery();
    if ($beforeQuery !== true) {
      return $this->failure($beforeQuery);
    }
    $data = $this->getData();
    $list = $this->iterate($data);

    $datetime = new DateTime('Europe/London');
    $curtime = $datetime->format('Y\-m\-d\ H:i:s');

    $json = $this->outputArray($list,$data['total']);

    $array = json_decode($json,true);
    $array['curtime'] = $curtime;
    $json = json_encode($array);

    return $json;
  }