Bug 34124 [implementation] Java outline viewer does not use element map
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
static Object[] NO_CHILDREN= new Object[0];
   
			/**
			 * The element change listener of the java outline viewer.
			 * @see IElementChangedListener
			 */
			class ElementChangedListener implements IElementChangedListener {