public function BaseGetUserVersions($arg)
 {
     // $arg : CbgrnItemVersionType class or this array
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args = $this->getRegularArgs($arg, __FUNCTION__, "CbgrnItemVersionType");
     $this->encodeString($reg_args);
     $results = parent::BaseGetUserVersions($reg_args);
     $this->methodClose();
     return $this->RetvalConvertArray($results->user_item);
     // returns array of stdClass
 }