What I find troubling about that page is that it does not qualify up front whether the dependencies are:

A. Also depended upon by other, coequal unrelated classes, possibly maintained by others, OR

B. Depended upon only by a single class (of higher functionality)

Situation A is sometimes called a portability interface; B might be called an internal structuring interface.

The difference has crucial implications for social power relationships between the human developers and users involved.