anchor.diff:  blocks_backend_config(_) ->
       {be_blocks, riak_kv_bitcask_backend, [{data_root, "./data/bitcask"}]}.
   
  -riak_ee_config(CsVsn, Backend) ->
  -    [repl_config() | riak_oss_config(CsVsn, Backend)].
  +riak_ee_config(Vsn, CsVsn, Backend) ->
  +    [repl_config() | riak_oss_config(Vsn, CsVsn, Backend)].
   
   repl_config() ->
       {riak_repl,
  
positive.code:           backend_config(CsVsn, Backend)
        }
      ].
  
  backend_config(_CsVsn, memory) ->
      [{storage_backend, riak_kv_memory_backend}];
  
negative.code: 
  previous_riak_config() ->
      riak_config(
        previous,
        ?CS_PREVIOUS,
        rt_config:get(build_type, oss),
        rt_config:get(backend, {multi_backend, bitcask})).
  