QHash<QString, QVariant> Settings::_settingsCache;
QHash<QString, bool> Settings::_settingsKeyPersistedCache;
QHash<QString, std::shared_ptr<SettingsChangeNotifier>> Settings::_settingsChangeNotifier;
#ifdef Q_OS_MAC
QHash<QString, QVariant> Settings::_settingsCache;
QHash<QString, bool> Settings::_settingsKeyPersistedCache;
QHash<QString, std::shared_ptr<SettingsChangeNotifier>> Settings::_settingsChangeNotifier;
#ifdef Q_OS_MAC