anchor.diff:      case gen_server:call({global, ?MODULE}, {get, Key}) of
           {ok, Value} ->
               Value;
  -        error ->
  +        undefined ->
               Default
       end.
   
  
positive.code: 
  -include("basho_bench.hrl").
  
  -record(basho_bench_config_state, {config_keys}).
  
  -type state() :: #basho_bench_config_state{}.
  %% ===================================================================
  %% Public API
  %% ===================================================================
  
  ensure_started() -> 
      start_link().
  
  
negative.code:     case gen_server:call({global, ?MODULE}, {get, Key}) of
          {ok, Value} ->
              Value;
          undefined ->
              erlang:error("Missing configuration key", [Key])
      end.
  
  