I'm working with a custom ACSet implementation, and elements(mySet) immediately throws a MethodError; I…

I'm working with a custom ACSet implementation, and elements(mySet) immediately throws a MethodError; I…: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). The concrete data structures, validation locations, and code organization are up to the implementer. The fix…

The task

The concrete data structures, validation locations, and code organization are up to the implementer. The fix should be driven by the public behavior of ACSet values participating in the category-of-elements round trip, not by special-casing only one test fixture.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.