code: public TableGenerator<Entity<T>> getOrCreateTableGenerator()
     {
        Node node = childNode.getOrCreate("table-generator");
        TableGenerator<Entity<T>> tableGenerator = new TableGeneratorImpl<Entity<T>>(this, "table-generator", childNode, node);
        return tableGenerator;
     }
docs: If not already created, a new <code>table-generator</code> element with the given value will be created.
  Otherwise, the existing <code>table-generator</code> element will be returned.
  @return  a new or existing instance of <code>TableGenerator<Entity<T>></code>