anchor.diff:          Path ->
               {ok, AppData} = file:consult(Path),
               [{application, App, Config}] = AppData,
  -            start_app(App, Config, Type)
  +            Callback(App, Config, Type)
       end.
   
   lookup_app(App) ->
  
positive.code: %% -----------------------------------------------------------------------------
  
  -module(appstart).
  -export([start/1, start/2]).
  
  -define(FIND_ERROR_PREDICATE, fun({error, _}) -> true; (_) -> false end).
  
  
negative.code:                 _ -> {error, {no_app_file, App}}
              end
      end.
  