Error converting treemapper to angular

[no_one345]

i m trying to convert tree mapper to angular i came across a problem that in angular
i get an error on treenode which is a function that returns nothing
same error is on mapping link in link templates
my question is how to call this treenode() in this template in agular

[walter]

You need to define TreeNode as a class that extends go.Node.

There are a lot of examples of translating classes from JavaScript to TypeScript in the extensionsTS folder.