code: func (r *Number) Increment(i float64) {
  	if i == 0 {
  		return
  	}
  
  	r.Mutex.Lock()
  	defer r.Mutex.Unlock()
  
  	b := r.getCurrentBucket()
  	b.Value += i
  	r.removeOldBuckets()
  }
docs: // Increment increments the number in current timeBucket.