QCommandLineParser::​addOptions always returns false (according to the documentation)

Hi,

5.4.0 introduces: http://doc.qt.io/qt-5/qcommandlineparser.html#addOptions

But it's documentation looks a bit odd to me. It says:
--------------------
Adds the options options to look for while parsing.

Returns false if adding any of the options failed; otherwise returns false.

Cf. addOption() for when it may fail.

This function was introduced in Qt 5.4.
--------------------

I read the "Returns false if adding any of the options failed; otherwise returns false." as always returns false. That can't possible be true, right?

Then one line down i see: "Cf. addOption() for when it may fail."
Where did "Cf" come from?

I think this documentation could be cleared up a little.

Cheers,
Mark