# File lib/httpclient/http.rb, line 460
      def dump_chunked(header = '', dev = '')
        dev << header
        if @body.is_a?(Parts)
          @body.parts.each do |part|
            if Message.file?(part)
              reset_pos(part)
              dump_chunks(part, dev)
            else
              dev << dump_chunk(part)
            end
          end
          dev << (dump_last_chunk + CRLF)
        elsif @body
          reset_pos(@body)
          dump_chunks(@body, dev)
          dev << (dump_last_chunk + CRLF)
        end
        dev
      end