# generate method

String generate({

1. V4Options? options,

})

v4() Generates a RNG version 4 UUID

By default it will generate a string based cryptoRNG, and will return a string. If you wish to use crypto-strong RNG, pass in UuidUtil.cryptoRNG

The first argument is an options map that takes various configuration options detailed in the readme.

http://tools.ietf.org/html/rfc4122.html#section-4.4

## Implementation

    String generate({V4Options? options}) {
      // Use the built-in RNG or a custom provided RNG
      List<int> rng = options?.rng?.generate() ??
          goptions?.rng?.generate() ??
          V4State.random.generate();

      // Use provided values over RNG
      List<int> rnds = options?.random ?? rng;

      // per 4.4, set bits for version and clockSeq high and reserved
      rnds[6] = (rnds[6] & 0x0f) | 0x40;
      rnds[8] = (rnds[8] & 0x3f) | 0x80;

      return UuidParsing.unparse(rnds);
    }