For the c++ api dox this expands to "\c nullptr" (the \c directive indicates a code literal value), and for sipify/Python it expands to ``None`` (`` is sphinx annotation for literal values) Makes for nicer dox for both c++ and Python!
Should be "gets ..." for consistent tense, or better yet "returns ..." for consistency.
Use Qt style "returns .." tense instead of "return ..", and lock this in with a documentation compliance unit test
