code: func NewStatsd(addr, prefix string) (*Statsd, error) {
  	c, err := statsd.NewClient(addr, prefix)
  	if err != nil {
  		return nil, err
  	}
  	return &Statsd{
  		client: c,
  	}, nil
  }
docs: // NewStatsd returns a new Statsd implementation that sends stats to addr.