code: func Generate(text string, l qr.Level, w io.Writer) {
  	config := Config{
  		Level:     l,
  		Writer:    w,
  		BlackChar: BLACK,
  		WhiteChar: WHITE,
  		QuietZone: QUIET_ZONE,
  	}
  	GenerateWithConfig(text, config)
  }
docs: // Generate a QR Code and write it out to io.Writer