public GroupPanel GroupPanel {get;}
public GroupPanel GroupPanel {get;}
This group's member Nodes and Links are not visual children of this group. However, if there is a GroupPanel in the group's visual tree, it will be measured and arranged to have the same bounds as the collection of member nodes.
The location of the Group is always the location of its GroupPanel, if it has one. If there is a GroupPanel, it must be named and referred to as the LocationElementName for the group.