    # File lib/merb-core/dispatch/session.rb, line 82
        def rand_uuid
          if defined?(SecureRandom)
            SecureRandom.hex(16)
          else
            values = [
              rand(0x0010000),
              rand(0x0010000),
              rand(0x0010000),
              rand(0x0010000),
              rand(0x0010000),
              rand(0x1000000),
              rand(0x1000000),
            ]
            "%04x%04x%04x%04x%04x%06x%06x" % values
          end
        end