While showing tree view(separate diagram used to build tree view) in tooltip links are not shown

I have shown tree view in tooltip, but while showing tooltip it is not showing links between its parent and child.

image

in above image you can see it is only showing expanded icon but not showing links.
Please help me.

If you look at the https://gojs.net/latest/samples/treeView.html sample, no links are shown because the visible link template is commented out. What are you using as the link template?

Oops…my mistake, the visible link template was commented.