+ //! Returns true if the given document is a sub-document of this tree
+ virtual bool hasDocument(const boost::shared_ptr<ModelAPI_Document>& theDoc) const;
+
+ //! Returns parent index of the given feature
+ virtual QModelIndex findParent(const boost::shared_ptr<ModelAPI_Feature>& theFeature) const;
+
+ //! Returns index corresponded to the group
+ virtual QModelIndex findGroup(const std::string& theGroup) const;
+