toDurationString function
Implementation
String toDurationString(Duration diff) {
if (diff.inDays >= 1) {
return '${diff.inDays}d';
}
if (diff.inHours >= 1) {
return '${diff.inHours}h';
}
if (diff.inMinutes >= 1) {
return '${diff.inMinutes}m';
}
return '${diff.inSeconds}s';
}