code: func builderScript(builder *txscript.ScriptBuilder) []byte {
  	script, err := builder.Script()
  	if err != nil {
  		panic(err)
  	}
  	return script
  }
docs: // builderScript is a convenience function which is used for hard-coded scripts
  // built with the script builder.   Any errors are converted to a panic since it
  // is only, and must only, be used with hard-coded, and therefore, known good,
  // scripts.