Bug 11748 switch to new DecoratorManager API
From the workbench change notes: API changes IWorkbenchPartSite.getDecoratorManager() - As the DecoratorManager has proven to be required for more than just IWorkbenchPartSites we have moved getDecoratorManager() to IWorkbench and deprecated the getDecoratorManager() in IWorkbenchPartSite. The one in IWorkbenchPartSite will be removed after the other Eclipse components have had a chance to switch to the new API.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
disassociate(c[k]);
							c[k].dispose();
						}
					}
					
					updateItem(item, element);
					updatePlus(item, element);					
					internalExpandToLevel(item, ALL_LEVELS);
					
					fReusedExpandedItem= null;
				}
				
				/*
				 * @see TreeViewer#createTreeItem
				 */
				protected void createTreeItem(Widget parent, Object element, int ix) {
					Item[] children= getChildren(parent);
					boolean expand= (parent instanceof Item && (children == null || children.length == 0));
					
					Item item= newItem(parent, SWT.NULL, ix);				
					updateItem(item, element);
					updatePlus(item, element);
					
					if (expand)
						setExpanded((Item) parent, true);
						
					internalExpandToLevel(item, ALL_LEVELS);
				}
				
				protected boolean mustUpdateParent(IJavaElementDelta delta, IJavaElement element) {