code: func (o *Out) SetRawTerminal() (err error) {
  	if os.Getenv("NORAW") != "" || !o.commonStream.isTerminal {
  		return nil
  	}
  	o.commonStream.state, err = term.SetRawTerminalOutput(o.commonStream.fd)
  	return err
  }
docs: // SetRawTerminal sets raw mode on the input terminal