code: func (g *Generator) Time(from time.Time, maxDelta time.Duration) time.Time {
  	delta, ok := g.times[from]
  	if !ok {
  		delta = time.Duration(g.r.Uint64() % uint64(maxDelta))
  		g.times[from] = delta
  	} else {
  		delta += time.Duration(g.r.Uint64() % uint64(maxDelta))
  		g.times[from] = delta
  	}
  	return from.Add(delta)
  }
docs: // Time returns a time increasing from the "from" time with a random delta.