Rng.fromSeed constructor
      
      Rng.fromSeed(
    
    
- int seed
Implementation
factory Rng.fromSeed(int seed) {
  final p = calloc<cvg.RNG>();
  cvRun(() => ccore.cv_RNG_create_1(seed, p));
  final rng = Rng._(p);
  return rng;
}