code: @SuppressWarnings("rawtypes")
  	private final void doPersistentContainer(Object container) {
          if (container instanceof DBArrayList) {
              doCollection((DBArrayList)container);
          } else if (container instanceof DBLargeVector) {
  //            doEnumeration(((DBLargeVector)container).elements(), container);
              doCollection(((DBLargeVector)container));
          } else if (container instanceof DBHashMap) {
              DBHashMap t = (DBHashMap)container;
              doCollection(t.keySet());
              doCollection(t.values());
          } else {
              throw new IllegalArgumentException(
                      "Unrecognized persistent container in OGT: "
                      + container.getClass());
          }
      }
docs: Handles persistent Collection classes.