code: func getQRCodeVersion(level RecoveryLevel, version int) *qrCodeVersion {
  	for _, v := range versions {
  		if v.level == level && v.version == version {
  			return &v
  		}
  	}
  
  	return nil
  }
docs: // getQRCodeVersion returns the QR Code version by version number and recovery
  // level. Returns nil if the requested combination is not defined.