code: func newFromBins(bins []bin, locks bool) *Histogram {
  	return &Histogram{
  		allocd:   uint16(len(bins) + 10), // pad it with 10
  		used:     uint16(len(bins)),
  		bvs:      bins,
  		useLocks: locks,
  	}
  }
docs: // NewFromBins returns a Histogram created from a bins struct slice