formatDateTime function

Implementation

String formatDateTime(DateTime? value) {
  if (value == null) {
    return 'n/a';
  } else if ((value.compareTo(DateTime.parse('0001-01-01 00:00:00.0000000')) ==
          0) ||
      (value.compareTo(DateTime.parse('1900-01-01 00:00:00')) == 0)) {
    return 'n/a';
  } else {
    return kDateTimeFormat.format(value);
  }
}