EDIT: I totally spaced it. I actually redid the adding of the mapping snapshot and I never actually reopened the Advancement class and it has names so nevermind this.
I am working on a mod that was once in 1.10.2 and used achievements but now porting to 1.12.2 and I forgot about advancements. I was wondering if there was a way to get some kind of mappings that I can use to use the advancements system in mc without having the generated names of class members. Unless it hasn't been done yet, is there some kind of alternative to doing so?