code: func IsPayToWitnessScriptHash(script []byte) bool {
  	pops, err := parseScript(script)
  	if err != nil {
  		return false
  	}
  	return isWitnessScriptHash(pops)
  }
docs: // IsPayToWitnessScriptHash returns true if the is in the standard
  // pay-to-witness-script-hash (P2WSH) format, false otherwise.