Stops the Stopwatch.
The elapsedTicks count stops increasing after this call. If the Stopwatch is currently not running, then calling this method has no effect.
void stop() { _stop ??= _now(); }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-core/Stopwatch/stop.html