An error occurred while fetching the assigned milestone of the selected merge_request.
The old return type (RecompRequired, Maybe _), was confusing
because it was inhabited by values like (UpToDate, Nothing) that made
no sense.
The new type ensures:
you must provide a value if it is up to date.
you must provide a reason if you don't provide a value.
it is used as the return value of:
checkOldIfacecheckByteCodecheckObjects