+public:
+ SignalGroup(const QString& name);
+
+ void append_signal(shared_ptr<SignalBase> signal);
+ void remove_signal(shared_ptr<SignalBase> signal);
+ deque<shared_ptr<SignalBase>> signals() const;
+ void clear();
+
+ const QString name() const;
+
+private:
+ deque<shared_ptr<SignalBase>> signals_;
+ QString name_;
+};
+
+
+class SignalBase : public QObject, public enable_shared_from_this<SignalBase>
+{
+ Q_OBJECT
+ Q_PROPERTY(QString error_message READ get_error_message NOTIFY error_message_changed)
+