code: function normalizeUrl(url, pathStripRe) {
    const normUrl = url.replace(/^file\:\/\//, '').replace(pathStripRe, '');
    if (normUrl.indexOf('/') !== 0) {
      return 'app:///' + normUrl;
    }
    return 'app://' + normUrl;
  }
docs: Strip device-specific IDs from React Native file:// paths
  Ensure path begins with / (after app://) to ensure source code and map path can be found