+ /// Saves the internal parameters to the given feature. Emits signals before and after store
+ /// \return True in success
+ bool storeValue();
+
+ /// Saves the internal parameters to the given feature
+ /// \return True in success
+ virtual bool storeValueCustom() const = 0;
+
+ /// Restore value from attribute data to the widget's control
+ virtual bool restoreValueCustom() = 0;
+
+ /// The method called when widget is activated