anchor.diff:  /// supported by flutter_localizations.''');
     buffer.writeln('const Map<String, dynamic> dateSymbols = <String, dynamic> {');
     symbolFiles.forEach((String locale, File data) {
  -    if (materialLocales.contains(locale))
  +    if (_supportedLocales().contains(locale))
         buffer.writeln(_jsonToMapEntry(locale, json.decode(data.readAsStringSync())));
     });
     buffer.writeln('};');
  
positive.code: /// supported by flutter_localizations.''');
    buffer.writeln('const Map<String, Map<String, String>> datePatterns = <String, Map<String, String>> {');
    patternFiles.forEach((String locale, File data) {
      if (materialLocales.contains(locale)) {
        final Map<String, dynamic> patterns = json.decode(data.readAsStringSync());
        buffer.writeln("'$locale': <String, String>{");
        patterns.forEach((String key, dynamic value) {
  
negative.code:   final Map<String, File> symbolFiles = _listIntlData(dateSymbolsDirectory);
    final Directory datePatternsDirectory = Directory(path.join(pathToIntl, 'src', 'data', 'dates', 'patterns'));
    final Map<String, File> patternFiles = _listIntlData(datePatternsDirectory);
    final StringBuffer buffer = StringBuffer();
  
    buffer.writeln(
  