+ MODEL_EXPORT virtual std::list<ObjectPtr> list();
+
+ /// Returns true if the object is in list
+ MODEL_EXPORT virtual bool isInList(const ObjectPtr& theObj);
+
+ /// Returns the list of features
+ ///\param theIndex zero-based index in the list
+ ///\param theWithEmpty if it is false, counts the not-empty referenced objects only
+ MODEL_EXPORT virtual ObjectPtr object(const int theIndex, const bool theWithEmpty = true) const;
+
+ /// Substitutes the feature by another one. Does nothing if such object is not found.
+ MODEL_EXPORT virtual void substitute(const ObjectPtr& theCurrent, const ObjectPtr& theNew);
+
+ /// Removes the last element in the list.
+ MODEL_EXPORT virtual void removeLast();