e done before attaching any objects to it.
rootNode->enableNamingControl(ObserverHints::EditableNames,NamingPolicyFilter::ProhibitDuplicateNames);
\endcode

The image below shows what happens when we want to change an object name inside the top level observer context to the name of an existing object.

\image html observer_widget_doc_tree_view_naming_delegate.jpg "Observer Widget Handling Context Naming Policies"

\subsection hierarchical_display Hierarchical (categorized) display options

An useful feature