tearDownAll method
Registers a function to be run once after all tests.
Implementation
void tearDownAll(
FutureOr<dynamic> Function() callback, {
TestLocation? location,
}) {
_checkNotBuilt('tearDownAll');
if (_collectTraces) _tearDownAllTrace ??= Trace.current(2);
_tearDownAllLocation ??= location;
_tearDownAlls.add(callback);
}