/**
  * Given a valid servive URI and a valid string of JSON,
  * this method communcates with the SiCDS and returns a
  * list of all unique ID's
  *
  * @param string $uri
  * @param string $json
  * @return string
  */
 public function InterafceWithSiCDS($uri, $json)
 {
     include_once Setup::Modules_Directory() . "/SiSW/ServiceWrapper.php";
     $service = new \Swiftriver\Core\Modules\SiSW\ServiceWrapper($uri);
     $jsonFromService = $service->MakePOSTRequest(array("data" => $json), 5);
     return $jsonFromService;
 }