code: func NewRegisteredTimer(name string, r Registry) Timer {
  	c := NewTimer()
  	if nil == r {
  		r = DefaultRegistry
  	}
  	r.Register(name, c)
  	return c
  }
docs: // NewRegisteredTimer constructs and registers a new StandardTimer.
  // Be sure to unregister the meter from the registry once it is of no use to
  // allow for garbage collection.