| Contents of the lookup for a top component.
Should contain its activated nodes, as well as their lookups merged.
Also contains an ActionMap instance which is a
DelegateActionMap .
If there is no selection (as opposed to an empty selection), the lookup on Node
nonetheless contains one item assignable to Node but with a null instance (!).
If a node contains itself or another node in its lookup, this does not produce
any duplication in the top component lookup.
Queries on Node will return only nodes actually in the activated node list.
author: Jaroslav Tulach |