Z-index order between node and link

GoJS
1

HI, How can i set the z-index order between nodes and links. Basically links overlaps the nodes. How to set the links behind the nodes? Thank you
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2

See the intro page: GoJS Layers -- Northwoods Software

3

HI Jhardy,
given link is helpful. new go.Binding("zOrder") makes trick
Thank you