# File lib/aws/core/options/json_serializer.rb, line 47
        def serialize request_options
          request_options = request_options[@payload_param] if @payload_param
          data = normalize_keys(request_options, rules)
          if rules.any?{|k,v| v[:location] == 'body' }
            data = data.values.first
          end
          JSON.pretty_generate(data)
        end