/home/buildbot/worker/l-upphub-XMLMenu/build/XMLMenu/examples/TestXMLMenu/TestXMLMenu.cpp:17:4: error: call to member function 'Add' is ambiguous
                .Add("New"                      , callback(dummyCb))
                ~^~~
/home/buildbot/worker/l-upphub-XMLMenu/build/XMLMenu/XMLMenu/XMLCommand.h:89:16: note: candidate function
                XMLCommands &Add(const char *id, Function<void()> cb)
                             ^
/home/buildbot/worker/l-upphub-XMLMenu/build/XMLMenu/XMLMenu/XMLCommand.h:94:16: note: candidate function
                XMLCommands &Add(const char *id, Function<void(XMLToolBar &)> mc)
                             ^