/**
  * @see EPSInterface::getMicroregionId
  */
 public function getMicroregionId($sessionId, $coordX, $coordY)
 {
     try {
         $getMicroregionIdSdtClass = new stdClass();
         $getMicroregionIdSdtClass->sessionId = $sessionId;
         $getMicroregionIdSdtClass->coordX = $coordX;
         $getMicroregionIdSdtClass->coordY = $coordY;
         $response = parent::getMicroregionId($getMicroregionIdSdtClass);
         if (isset($response->return)) {
             $microregionId = $response->return;
         } else {
             $microregionId = null;
         }
         return $microregionId;
     } catch (SoapFault $sf) {
         throw new ServerException($sf);
     }
 }