prefer-private-extension-type-field
Warns when an extension type has a public representation field.
Public representation fields can be accessed directly, which may lead to potential mistakes. Consider exposing only the required properties or methods.
Example
❌ Bad:
// LINT: Avoid exposing the representation field. Try making it private.
extension type ET(String value) {}
✅ Good:
extension type ET(String _value) {
bool get isCorrect => _value.isNotEmpty;
}