timestamp static method
Formats a duration as a fixed-width timestamp, e.g. [01:12.5]
Implementation
static String timestamp(Duration d) {
String minutes = d.inMinutes.toString().padLeft(2, "0");
String seconds = ((d.inMilliseconds % 60000) / 1000).toStringAsFixed(1).padLeft(4, "0");
return "[$minutes:$seconds]";
}