1.175.3 Get methods

tree <-contains: -> chain

New chain holding all node objects in the tree.

Its device functionality would be to return the chain of graphicals, holding only the graphicals for the displayed nodes and connections.

The contains-hierarchy for trees is defined as follows:

tree
|  node
|   |  image

Image (being a graphical) may contain any number of sub-visuals.

See also

- graphical<-contained_in
- node<-contains
- node<-contained_in