How to use TreeList widget in my custom node editor

I'm looking at Node-RED docs/api/ui/treelist, but I don't know how to apply it.
I want to see some basic example of treelist.
Please help me!!

There is info and examples in the help: TreeList Widget : Node-RED

Also, you can look at how existing nodes do it e.g. the link nodes: node-red/60-link.html at master · node-red/node-red · GitHub

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Thanks for the reply.
But, I still can't apply it...
So I asked question again at below link. widget is not visible

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