A public association oriented from a public Classifier cannot be linked to a private or protected Classifier.
Making a public association to a private class usually means that the user of the association won’t be able to use it.
Java or C++ code generated from this kind of association will usually result in compilation error.
- Change the visibility of the association to private. It is widely
recommended that all attributes and associations be set to private. * Change the visibility of the target class to public.