Components from /libs/

I was looking, how, for example, Navbar was made, and I saw, that it uses components from /libs/ like Transition.
Looked into those, found this comment:
```
/*
* Only exposing the libraries for the public components,
* Internal components such as Markdown shouldn't be here.
*/
```

But are they really exposed? After importing, I couldn't find them anywhere in the exports of "element-react".