Bug 16897 No busy indicator while populating type hierarchy
Build: Freeze 1 In a self-hosting workspace, select the type IAdaptable in an editor and hit F4 to populate the type hiearchy. Since this interface has many sub-types, this takes several seconds to populate. There should be a busy indicator while this is happening.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
doTypeHierarchyChangedOnViewers(changedTypes);
					}
				}
			});
		}
	}
	
	private void doTypeHierarchyChangedOnViewers(IType[] changedTypes) {
		if (fHierarchyLifeCycle.getHierarchy() == null || !fHierarchyLifeCycle.getHierarchy().exists()) {
			clearInput();
		} else {
			if (changedTypes == null) {
				
				try {
					fHierarchyLifeCycle.ensureRefreshedTypeHierarchy(fInputElement);
				} catch (JavaModelException e) {
					JavaPlugin.log(e.getStatus());
					clearInput();
					return;
				}
				updateHierarchyViewer();
			} else {
				
				if (getCurrentViewer().isMethodFiltering()) {
					if (changedTypes.length == 1) {
						getCurrentViewer().refresh(changedTypes[0]);
					} else {
						updateHierarchyViewer();
					}
				} else {