# File lib/aws/core/option_grammar.rb, line 415
          def request_params values, prefix = nil
            values.inject([]) do |params, (key,value)|

              index = params.size / 2 + 1
              common_prefix = "#{prefixed_name(prefix)}#{separator}#{index}."

              key_name = common_prefix + key_option.param_name
              value_name = common_prefix + value_option.param_name

              params << Http::Request::Param.new(key_name, key)
              params << Http::Request::Param.new(value_name, value)

            end
          end