code: function(length) {
        var bytes, hex;
        if (length == null) {
          length = 32;
        }
        length /= 2;
        bytes = this.randomBytes(length);
        return hex = this.toHex(bytes).toUpperCase();
      }
docs: Generate a uuid.
  @param {Number} [length=32] The length of the UUID.
  @return {String} The UUID.