Example of loading remote config, avoiding stale values during testing

app_root.dart

_initRemoteConfig(ExperimentalMode experimentalMode) async {
  final RemoteConfig remoteConfig = RemoteConfig.instance;

  var cacheDuration = Duration(hours: 1);
  // allows us to force update the cache even when we exit the experimental mode
  if (experimentalMode.isExperimentalMode || experimentalMode.isConfigStale()) {
    cacheDuration = Duration(seconds: 0);
  }
  experimentalMode.setConfigStale(false);
  await remoteConfig.setConfigSettings(RemoteConfigSettings(
    fetchTimeout: const Duration(seconds: 10),
    minimumFetchInterval: cacheDuration,
  ));

  await remoteConfig.fetchAndActivate();
}