pause method
Pauses the stopwatch for ref and accumulates elapsed time.
Implementation
void pause({String? ref}) {
ref ??= currentReference;
if (_stopwatches.containsKey(ref) && _stopwatches[ref]!.isRunning) {
_stopwatches[ref]!.stop();
_accumulatedTime[ref] = _accumulatedTime[ref]! + _stopwatches[ref]!.elapsed.inSeconds;
_stopwatches[ref]!.reset();
AppConfig.logger.i('NeomStopwatch paused for $ref; accumulated: ${_accumulatedTime[ref]}s.');
}
}