didPopNext method
Called when the top route has been popped off, and the current route shows up.
Implementation
@override
void didPopNext() async {
_routeIsShowing = true;
if (shouldShowTooltip) {
// Covering route was popped off the navigator.
_removeTooltip();
await Future.delayed(Duration(milliseconds: 100));
if (mounted) _showTooltip();
}
}