StopwatchModel constructor
Creates a new stopwatch model.
interval is how often the stopwatch ticks (defaults to 100 milliseconds).
Implementation
StopwatchModel({
this.interval = const Duration(milliseconds: 100),
DateTime Function()? nowProvider,
}) : _elapsed = Duration.zero,
_running = false,
_nowProvider = nowProvider ?? _defaultBubbleNowProvider,
_id = _nextStopwatchId(),
_tag = 0;