# File lib/fog/aws.rb, line 197
      def self.request_id
        request_id = []
        request_id << Fog::Mock.random_hex(8)
        3.times do
          request_id << Fog::Mock.random_hex(4)
        end
        request_id << Fog::Mock.random_hex(12)
        request_id.join('-')
      end