error: duplicate xx conversion from 's64' to 'Wrap': impls in /Users/agra/projects/sx/examples/./0411-protocols-impl-duplicate-impl-a.sx and /Users/agra/projects/sx/examples/./0411-protocols-impl-duplicate-impl-b.sx
  --> /Users/agra/projects/sx/examples/0411-protocols-impl-duplicate.sx:20:17
   |
20 |   w : Wrap = xx 7;
   |                 ^