code: func (o *Generator) ReadV4(ids []UUID) {
  	for i := range ids {
  		id := UUID{}
  		o.v4(&id)
  		ids[i] = id
  		continue
  	}
  	return
  }
docs: // ReadV4 will read into a slice of UUIDs. Be careful with the set amount.
  // Note: V4 UUIDs require sufficient entropy from the generator.
  // If n == len(ids) err will be nil.