toTzTimeOfDayString method
Converts the time of day of this date-time to an HH:mm:ss string in
either local or UTC time zone.
The result carries no time zone marker - state the zone with timeZoneLabel where the value is displayed.
Implementation
String toTzTimeOfDayString(bool inUtc) {
final time = inUtc ? toUtc() : toLocal();
return [
time.hour,
time.minute,
time.second,
].map((part) => part.toString().padLeft(2, '0')).join(':');
}