debug method
void
debug()
Implementation
void debug() {
var valuesList = _items.entries.toList(growable: false);
var totalTime = valuesList.map((e) => e.value.elapsed).reduce((value, element) => value + element).inMicroseconds;
var iterable = valuesList.map((e) => _Item(e.key, (e.value.elapsedMicroseconds / totalTime) * 100));
var sortedList = iterable.toList(growable: false)..sort((a, b) => a.value > b.value ? -1 : 1);
print([
sortedList,
Duration(microseconds: totalTime).inMicroseconds,
Duration(microseconds: totalTime).inMilliseconds,
Duration(microseconds: totalTime),
]);
}