also be used as format arguments. Note that the relevant headers are only likely to be
available on Darwin (OSX) installations. On such installations, the XCode and system
documentation provide descriptions of ``CFString``, ``CFStringRefs`` and
also be used as format arguments. Note that the relevant headers are only likely to be
available on Darwin (OSX) installations. On such installations, the XCode and system
documentation provide descriptions of ``CFString``, ``CFStringRefs`` and