def status(status = nil)
        case status
        when Symbol
          raise ArgumentError, "Status code :#{status} is invalid." unless Rack::Utils::SYMBOL_TO_STATUS_CODE.keys.include?(status)
          @status = Rack::Utils.status_code(status)
        when Integer
          @status = status
        when nil
          return @status if @status
          case request.request_method.to_s.upcase
          when Grape::Http::Headers::POST
            201
          when Grape::Http::Headers::DELETE
            if @body.present?
              200
            else
              204
            end
          else
            200
          end
        else
          raise ArgumentError, 'Status code must be Integer or Symbol.'
        end