/**
  * convert Tinebase_Record_RecordSet to Sabre\VObject\Component
  *
  * @param  Tinebase_Record_RecordSet  $_records
  * @return Sabre\VObject\Component
  */
 public function fromTine20RecordSet(Tinebase_Record_RecordSet $_records)
 {
     $oldGroupValue = static::$cutypeMap[Calendar_Model_Attender::USERTYPE_GROUP];
     // rewrite GROUP TO INTELLIGROUP
     static::$cutypeMap[Calendar_Model_Attender::USERTYPE_GROUP] = self::INTELLIGROUP;
     $result = parent::fromTine20RecordSet($_records);
     // restore old value
     static::$cutypeMap[Calendar_Model_Attender::USERTYPE_GROUP] = $oldGroupValue;
     return $result;
 }