code: func (b *Bloom) SetBytes(d []byte) {
  	if len(b) < len(d) {
  		panic(fmt.Sprintf("bloom bytes too big %d %d", len(b), len(d)))
  	}
  	copy(b[BloomByteLength-len(d):], d)
  }
docs: // SetBytes sets the content of b to the given bytes.
  // It panics if d is not of suitable size.