I'm trying to follow the tutorial here: https://docs.fd.io/honeycomb/1.17.01/release-notes-aggregator/devel_plugin_tutorial.html#_full_working_example

But the code generated by the archetype doesn't compile: it uses the `AbstractDataTreeConverter`, which was removed at 9a9c793a.

(there may be further issues waiting to be found once I've got past this first one, I don't yet know).