+using std::deque;
+using std::unordered_map;
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+namespace std {
+ template<> struct hash<QString> {
+ std::size_t operator()(const QString& s) const noexcept {
+ return (size_t) qHash(s);
+ }
+ };
+}
+#endif