Gets or sets the
Northwoods.GoXam.Layout.IDiagramLayout responsible for positioning all of the top-level nodes in the diagram.
Property Value
Initially this is an instance of
Northwoods.GoXam.Layout.DiagramLayout. This value may be null, in which case there is no automatic layout of top-level nodes, but there still may be layout of the nodes that are members of groups that have their own layouts.