namespace
{
// Cmake generates moc files only if they contains Q_OBJECT or Q_GADGET macro (nothing for Q_NAMESPACE)
// This has been fixed only in Cmake 3.10
// see: https://gitlab.kitware.com/cmake/cmake/issues/17299
// fix:
// https://gitlab.kitware.com/cmake/cmake/merge_requests/1321/diffs?commit_id=786b5be03bf992fe78a9a6450d5665ab7233a815
class CDUMMY
{
    Q_GADGET
};
}