anchor.diff:      Stream = proplists:get_value(stream, Opts, false),
       Continuation = proplists:get_value(continuation, Opts),
       Cover = proplists:get_value(cover_context, Opts),
  +    ReturnBody = proplists:get_value(return_body, Opts),
   
       {T, B} = maybe_bucket_type(Bucket),
   
  
positive.code:     Stream = proplists:get_value(stream, Opts, false),
      Continuation = proplists:get_value(continuation, Opts),
      Cover = proplists:get_value(cover_context, Opts),
  
      {T, B} = maybe_bucket_type(Bucket),
  
  
negative.code:                        stream=Stream,
                         continuation=Continuation,
                         cover_context=Cover,
                         return_body=ReturnBody,
                         timeout=Timeout},
      Call = case Stream of
                 true ->
  