Dumps message body to given dev. dev needs to respond to <<.
Message header must be given as the first
argument for performance reason. (header is dumped to dev, too) If no dev
(the second argument) given, this method returns a dumped String.
Dumps message body with chunked encoding to given dev. dev needs to respond
to <<.
Message header must be given as the first
argument for performance reason. (header is dumped to dev, too) If no dev
(the second argument) given, this method returns a dumped String.