anchor.diff:      Env#env{funs=Fs1}.
   
   is_fbound(N, A, #env{funs=Fs}) ->
  -    case orddict:find(N, Fs) of
  +    case ?FIND(N, Fs) of
           {ok,{function,Fas}} ->
               case lists:keyfind(A, 1, Fas) of
                   false -> is_bif(N, A);
  
positive.code: %% get_vars(Env) -> Vars.
  %% clr_vars(Env) -> Env.
  %% set_vars(Vars, Env) -> Env.
  %% get_funs(Env) -> Funs.
  %% clr_funs(Env) -> Env.
  %% set_funs(Funs, Env) -> Env.
  %% add_vbinding(Name, Val, Env) -> Env.
  %% add_vbindings([{Name,Val}], Env) -> Env.
  %% is_vbound(Symb, Env) -> bool().
  
negative.code: %% Copyright (c) 2008-2016 Robert Virding
  %%
  %% Licensed under the Apache License, Version 2.0 (the "License");
  %% you may not use this file except in compliance with the License.
  