final i = Intl(locale: Locale.parse('en-US'));
    final c = i.collation(CollationOptions(numeric: true));
    final lis = ['0', '1', '2', '10'];
    lis.sort((left, right) => c.compare(left, right));
    log('$lis');

extension on icu.Locale {
  void setOptions(CollationOptions options) {
    final icuNumeric = switch (options.numeric) {
      true => icu.CollatorNumericOrdering.on,
      false => icu.CollatorNumericOrdering.off,
      null => null,
    };
    if (icuNumeric != null &&
        getUnicodeExtension(_numericExtensionKey) != null) {
      setUnicodeExtension(_numericExtensionKey, icuNumeric.name); <-- HERE 
    }
}