anchor.diff:  -type proplist_elem() :: atom() | {atom(), value()}.
   
   
  --spec fetch/2 :: (
  +-spec fetch(
       Path :: name_path(),
       Dict :: orddict() ) -> value().
   
  
positive.code: %
  % During conversion, each atom() property is converted to {atom(), true}
  % dictionary association.
  -spec from_nested_proplist/1 :: (List :: proplist()) -> orddict().
  
  from_nested_proplist(L) ->
      from_nested_proplist(L, _MaxDepth = 'undefined').
  
negative.code: 
  
  % @doc Create list of json terms from JSON array
  -spec list_from_json_array(Json :: iodata()) ->
      [orddict() | binary() | integer() | float() | boolean() | 'undefined'].
  list_from_json_array(Json) ->%, list_to_json_array, list_from_json_term and list_to_json_term
      JsonTerm = mochijson2:decode(Json),
  