# File lib/rack/deflater.rb, line 90
      def each
        deflater = ::Zlib::Deflate.new(*DEFLATE_ARGS)
        @body.each { |part| yield deflater.deflate(part, Zlib::SYNC_FLUSH) }
        @body.close if @body.respond_to?(:close)
        yield deflater.finish
        nil
      end