show static method
Implementation
static show(BuildContext context, String message, {Function ()? dismissCallback}) {
var snackBar = SnackBar(
content: Text(message),
duration: Duration(seconds: 2),
);
WidgetsBinding.instance!.addPostFrameCallback((_){
ScaffoldMessenger.of(context).showSnackBar(snackBar).closed.then((value) {
if(dismissCallback != null) {
dismissCallback();
}
});
});
}