code: public CollectionTable<ElementCollection<T>> getOrCreateCollectionTable()
     {
        Node node = childNode.getOrCreate("collection-table");
        CollectionTable<ElementCollection<T>> collectionTable = new CollectionTableImpl<ElementCollection<T>>(this, "collection-table", childNode, node);
        return collectionTable;
     }
docs: If not already created, a new <code>collection-table</code> element with the given value will be created.
  Otherwise, the existing <code>collection-table</code> element will be returned.
  @return  a new or existing instance of <code>CollectionTable<ElementCollection<T>></code>