code: func bytesToUintLittleEndian(b []byte) (res uint64) {
  	mul := uint64(1)
  	for i := 0; i < len(b); i++ {
  		res += uint64(b[i]) * mul
  		mul *= 256
  	}
  	return res
  }
docs: // bytesToUintLittleEndian converts the slice to 64-bit unsigned integer.