code: public void performInsert()
      {
          if(insertMap == null)
              return;
          else
          {
              PersistenceBroker broker = tx.getBroker();
              Iterator it = insertMap.values().iterator();
              while(it.hasNext())
              {
                  NamedEntry namedEntry = (NamedEntry) it.next();
                  namedEntry.prepareForStore(broker);
                  broker.store(namedEntry, ObjectModification.INSERT);
              }
          }
      }
docs: Have to be performed after the "normal" objects be written
  to DB and after method {@link #performDeletion()}.