These identifiers pollute every instance of DefaultedRegistry which are quite a lot.

This does not cause any issues right now but it is very annoying seeing all those fields in my IDE when debugging.
Even worse they are not private.

Should hopefully be fixed in latest commit. If you could try it out I would make a release if it seems good

I don't really wanna download the source and setup the project, can you give me a jar?

No problem, here you go: mythicmetals-0.11.4.zip

Just tried it out, and it's fixed

Fixed and released as of 0.11.4