private final TitanType getTypeFromID(long etid, InternalTitanTransaction tx) {
   if (idManager.getGroupID(etid) == SystemTypeManager.SYSTEM_TYPE_GROUP.getID()) {
     // its a systemtype
     return SystemTypeManager.getSystemEdgeType(etid);
   } else {
     return (TitanType) tx.getVertex(etid);
   }
 }