public function WorkflowGetReceivedApplicationVersions($start, $end = false, $application_items = false)
 {
     // $start   : UNIX timestamp
     // $end     : UNIX timestamp (optional)
     // $application_items : CbgrnItemVersionType class or this array
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args["start"] = gmdate(W3C_DATETIME_FORMAT, $start);
     if ($end !== false) {
         $reg_args["end"] = gmdate(W3C_DATETIME_FORMAT, $end);
     }
     if ($application_items !== false) {
         $reg_args["application_item"] = $this->getRegularArgs($application_items, __FUNCTION__, "CbgrnItemVersionType");
     }
     $this->encodeString($reg_args);
     $results = parent::WorkflowGetReceivedApplicationVersions($reg_args);
     $this->methodClose();
     return $this->RetvalConvertArray($results->application_item);
 }