How to add 'Range' property to base Printable definition?

[marlon-tucker]

Hello,

Judging from the node extension ability with builders, this looks like it should be possible, but after about an hour of fiddling, the property doesn't show in my typescript type checking.

Any chance of a quick example as to how one would achieve this?

Esprima attaches a Range property (which is an array of numbers) to each node if the user requests it.

Thanks

Marlon