The member 'AsyncNotifierProviderImpl' can only be used within 'package:riverpod/src/async_notifier/base.dart' or a test.

[serhii-k]

Describe the bug
The generated code for the following provider triggers this warning:
warning: The member 'AsyncNotifierProviderImpl' can only be used within 'package:riverpod/src/async_notifier/base.dart' or a test. (invalid_use_of_visible_for_testing_member at ...)

To Reproduce

@Riverpod(keepAlive: true)
class Test extends _$Test {
  @override
  FutureOr<int> build(int tabId) => 0;
}

The autoDispose version (@riverpod) doesn't produce this warning.

Expected behavior
No warnings.