toTimestamp method
This UTC DateTime as a Timestamp.
Implementation
Timestamp toTimestamp() {
if (!isUtc) {
throw StateError('DateTime must be in UTC');
}
return Timestamp(
seconds: microsecondsSinceEpoch ~/ 1_000_000,
nanos: microsecondsSinceEpoch % 1_000_000 * 1000,
);
}