anchor.diff:      case application:get_application() of
           {ok, AppName} ->
               get_pool(AppName);
  -        _ ->
  -            {error, no_pools_found}
  +        undefined ->
  +            get_pool(undefined)
       end.
   
   get_pool(AppName)->
  
positive.code: 
  init([]) ->
      {ok, Config} = application:get_env(riak_pool, pools),
      Pools = lists:foldl(
          fun ({AppName, PoolName}, Acc) ->
              dict:append(AppName, PoolName, Acc)
  
negative.code:         [{AppName, PoolName} || {AppName, AppPools} <- Config, {PoolName, _PoolConfig} <- AppPools]
      ),
  
      {ok, #state{orig_pools = Pools, curr_pools = Pools, default_app = DefaultApp}}.
  
  handle_call({get_pool, undefined}, _From, State = #state{default_app = undefined}) ->
      {reply, {error, no_pools_found}, State};
  
  handle_call({get_pool, undefined}, From, State = #state{default_app = DefaultApp}) ->
      handle_call({get_pool, DefaultApp}, From, State);
  
  handle_call({get_pool, ForApp}, _From, State = #state{orig_pools = OPools, curr_pools = CPools}) ->
      case dict:find(ForApp, CPools) of
  