durationToOffsetString static method
Implementation
static String durationToOffsetString(Duration duration) {
int hours = duration.inHours.abs();
int minutes = (duration.inMinutes.abs() % 60);
String sign = duration.isNegative ? '-' : '+';
return '$sign${hours.toString().padLeft(2, '0')}${minutes.toString().padLeft(2, '0')}';
}