anchor.diff:      syntax :: map(),
       path :: binary(),
       defaults :: map(),
  +    mandatory :: [binary()],
       opts :: map()
   }).
   
  
positive.code: 
  %% @private
  do_parse_key(Key, Val, Parse) ->
      #parse{ok=OK, ok_exp=OkExp, no_ok=NoOk, defaults=Defaults} = Parse,
      case to_existing_atom(Key) of
          {ok, Key2} ->
              case find_config(Key2, Val, Parse) of
                  {ok, Key3, Val3} ->
  
negative.code: %% EUnit tests
  %% ===================================================================
  
  -define(TEST, 1).
  -ifdef(TEST).
  -include_lib("eunit/include/eunit.hrl").
  
  