code: func (b *BitSet) Get(o int) bool {
  	bucketID := o / 8
  	oInBucket := uint8(o % 8)
  	if o >= b.size {
  		return false
  	}
  	return (b.set[bucketID]&(0x1<<oInBucket))>>oInBucket == 0x1
  }
docs: // Get the value of bit at offset o