anchor.diff:                  true -> <<"acl">>;
                   false -> <<"posix">>
               end,
  -            <<"acl">> => gs_protocol:gri_to_string(#gri{
  +            <<"acl">> => gri:serialize(#gri{
                   type = op_file,
                   id = Guid,
                   aspect = acl,
  
positive.code: 
          #{
              <<"name">> => Name,
              <<"owner">> => gs_protocol:gri_to_string(#gri{
                  type = op_user,
                  id = Owner,
                  aspect = instance,
  
negative.code: translate_space(#gri{aspect = eff_users, scope = private}, Users) ->
      #{
          <<"list">> => lists:map(fun(UserId) ->
              gri:serialize(#gri{
                  type = op_user,
                  id = UserId,
                  aspect = instance,
  