How to use the @sentry/browser.Severity.Fatal function in @sentry/browser

dispatch(showModal({
      confirm: null,
      message: 'modal.body_error',
      title: 'modal.title_error',
    }));
    dispatch(historyPop());
  });

  const { enabled, level, sampleRate } = appConfig.sentry;
  // Is not enabled
  if (!enabled) {
    return;
  }

  const severityMap = {
    [Severity.Fatal]: SentrySeverity.Fatal,
    [Severity.Error]: SentrySeverity.Error,
    [Severity.Critical]: SentrySeverity.Critical,
    [Severity.Warning]: SentrySeverity.Warning,
    [Severity.Info]: SentrySeverity.Info,
    [Severity.Debug]: SentrySeverity.Debug,
  };

  let trackedSeverities = Object.getOwnPropertySymbols(severityMap).map(s => severityMap[s]);
  const minSeverityIndex = trackedSeverities.indexOf(level);
  if (minSeverityIndex > -1) {
    trackedSeverities = trackedSeverities.slice(0, minSeverityIndex + 1);
  }

  subscribe(appWillStart$, ({ getState }) => {
    init({
      dsn: 'https://1a444b262ac6405594ab33fb0102b377@sentry.io/1398210',