code: func NewBitmap(a ...uint64) *Bitmap {
  	b := &Bitmap{
  		Containers: newSliceContainers(),
  	}
  	// TODO: We have no way to report this. We aren't in a server context
  	// so we haven't got a logger, nothing is checking for nil returns
  	// from this...
  	_, _ = b.AddN(a...)
  	return b
  }
docs: // NewBitmap returns a Bitmap with an initial set of values.