disposeObserver method
unwatch everything
Implementation
@mustCallSuper
void disposeObserver() {
// This prevents accessing the map concurrently.
final providers = _providers.values.toList();
for (final provider in providers) {
unwatch(provider);
}
_providers.clear();
_subscriptions.clear();
final effects = [..._effects];
for (final effect in effects) {
unregisterEffect(effect);
}
_effects.clear();
}