Bug 123424 browsing perspective does not show some packages in hierarchical mode
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/PackagesView.java
LayoutActionGroup(IAction[] actions, int index) {
			super(actions, index);
		}
		public void fillActionBars(IActionBars actionBars) {
			
			IMenuManager manager= actionBars.getMenuManager();
			final IContributionItem groupMarker= new GroupMarker("layout"); 
			manager.add(groupMarker);
			IMenuManager newManager= new MenuManager(JavaBrowsingMessages.PackagesView_LayoutActionGroup_layout_label);
			manager.appendToGroup("layout", newManager); 
			super.addActions(newManager);
		}
	}
	/**
	 * Switches between flat and hierarchical state.
	 */
	private class LayoutAction extends Action {