car-interface-android/lib/core/theme/theme_preference.dart

/// The three theme choices exposed in Settings.
enum ThemePreference {
  light('light'),
  dark('dark'),
  automatic('automatic');

  const ThemePreference(this.storageValue);

  final String storageValue;

  static ThemePreference fromStorage(String? value) {
    return ThemePreference.values.firstWhere(
      (preference) => preference.storageValue == value,
      orElse: () => ThemePreference.automatic,
    );
  }
}