Is it possible to add a prop to an external token?

I have some tokens defined with a prop, which are useful for me while traversing the tree.
Now I have also some external tokens defined, but I don’t see how (and if) I can add such a prop to these external tokens.
Is this possible? If yes, how?

Yes. If you’re declaring them in your grammar, add them to the declaration of the external token (like this). If you’re adding them in a script, you can just refer to them by name and it should work.

Great thanks. That works.

Thanks you for your fast answer.