expandTree format issue

@itsjustcarlos wrote:

I'm trying to use expandTree to expand tree
However, I'm getting an unexpected number error.

go.GraphObject.make(go.Node, "Auto",
   { 	expandTree(2),
   isTreeExpanded: false,
       },

Looked over the docs here, https://gojs.net/latest/api/symbols/Node.html#expandTree, but it wasn't clear to me what the format should be.

tried putting it outside the {} but that created other errors. not a function, not defined etc.

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