anchor.diff:  %% API
   -export([new/0]).
   -export([new/1]).
  +-export([close/1]).
   -export([add_type/2]).
   -export([lookup_type/2]).
   -export([fold/3]).
  
positive.code:     []             -> false;
      [{Name, Type}] -> {ok, Type}
    end.
  
  %%%===================================================================
  %%% Tests
  
negative.code: new(Options) ->
    Access = proplists:get_value(access, Options, private),
    init_ets_store(Access).
  
  close(Store) ->
    destroy_ets_store(Store).
  
  -spec add_type(avro_type(), store()) -> store().
  
  