anchor.diff:      {struct, [{Attr, Value}]};
   set_attr(Attr, Value) when is_list(Attr) ->
       set_attr(binary:list_to_bin(Attr), Value).
  -
  -replace_attr(Json, Path, Value) ->
  -	erlang:display("replace_attr should be implemented"),
  -	Json.
   
   
   %% @doc
  
positive.code: 
      NewJson4 = field_replace(NewJson3, "baz.fum.i.0", 9999999),
      erlang:display("9*****************************************************************"),
      erlang:display(NewJson4)
  
  
  	.
  
  
  %% ====================================================================
  
negative.code: 
  %% @doc
  %% Function: to_string/1
  %% Purpose:  Make a mochijson representation into a string
  %% Returns:  string()
  %% @end
  %% to_string(Json) when is_list(Json) ->
  