returns a reference to a descendant node in the query graph.
descendant Db4objects.Db4o.Query.IQuery node
returns a reference to a descendant node in the query graph.
If the node does not exist, it will be created.
All classes represented in the query node are tested, whether they contain a field with the specified field name. The descendant Query node will be created from all possible candidate classes.
IQuery Interface | Db4objects.Db4o.Query Namespace