anchor.diff:      erlang:nif_error(nif_library_not_loaded).
   
   -spec insert(mcache_handle(), key(), offset(), values()) ->
  -                 undefined |
  -                 {overflow, key(), chunks()}.
  +                    ok |
  +                    {overflow, key(), chunks()}.
   insert(_Handle, _Name, _Offset, _Value) ->
       erlang:nif_error(nif_library_not_loaded).
   
  
positive.code:     erlang:nif_error(nif_library_not_loaded).
  
  -spec is_empty(mcache_handle()) ->
                     boolean().
  is_empty(_Handle) ->
      erlang:nif_error(nif_library_not_loaded).
  
  
negative.code:     erlang:nif_error(nif_library_not_loaded).
  
  -spec remove_prefix(mcache_handle(), key()) ->
                             undefined |
                             {ok, non_neg_integer()}.
  
  remove_prefix(_Handle, _Name) ->
      erlang:nif_error(nif_library_not_loaded).
  
  -spec take(mcache_handle(), key()) ->
                    undefined |
                    {ok, chunks()}.
  
  take(_Handle, _Name) ->
      erlang:nif_error(nif_library_not_loaded).
  