toDateTimeUtc method
Implementation
DateTime toDateTimeUtc() {
if (Platform.isVM) return DateTime.fromMicrosecondsSinceEpoch(timeSinceEpoch.totalMicroseconds.toInt(), isUtc: true);
return DateTime.fromMillisecondsSinceEpoch(timeSinceEpoch.totalMilliseconds.toInt(), isUtc: true);
}