anchor.diff:  -behavior(riak_kv_backend).
   
   %% KV Backend API
  --compile(export_all).                           % TODO DEBUGGING ONLY
   -export([api_version/0,
            capabilities/1,
            capabilities/2,
  
positive.code:          is_empty/1,
           status/1,
           callback/3]).
  
  -ifdef(TEST).
  -include_lib("eunit/include/eunit.hrl").
  
negative.code: %% Test
  %%
  
  -ifdef(USE_BROKEN_TESTS).
  
  t0() ->
  