How can you properly and safely use a BuildContext across an asynchronous gap, such as directly after an await statement, without genuinely risking using a context that has since actually genuinely become invalid because its own underlying widget was already disposed of in the meantime?

Since an asynchronous operation can genuinely take some meaningful amount of time to actually complete, and the specific widget that originally provided a given particular BuildContext could genuinely have already been fully disposed of sometime during that same waiting period, such as if a user had already navigated away from that specific screen entirely in the meantime, safely using that same BuildContext directly after an await statement requires first properly checking whether the corresponding State object is still genuinely currently mounted, and Dart's own linter specifically flags this exact same common potential mistake through its well known use_build_context_synchronously lint rule, helping to properly and reliably catch this exact same particular kind of subtle bug before it could ever potentially cause a genuine runtime crash.

Future<void> loadData() async {
  final data = await fetchData();
  if (!mounted) return;
  ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Loaded')));
}