Well, either that or it's a misplaced/missing = sign for making it <h2> element. Now there's basically nothing in that part of the documentation and it seems like the document was changed
7 years ago.
Some of the parts below the header could belong to Python Objects, but that would most likely break the consistency of the document, so it'd be probably better to either remove that header completely or add appropriate documentation for declaring Python objects (maybe from C?).