Bug 51609 Not all interfaces shown in Type Hierarchy
I200402102000 Open Type Hierarchy on package junit.framework. Observe: only one interface instead of three is shown. Nothing in .log
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TraditionalHierarchyViewer.java
/*
	 * @see TypeHierarchyViewer#updateContent
	 */		
	public void updateContent(boolean expand) {
		getTree().setRedraw(false);
		refresh();
		
		if (expand) {
			TraditionalHierarchyContentProvider contentProvider= (TraditionalHierarchyContentProvider) getContentProvider();
			int expandLevel= contentProvider.getExpandLevel();
			if (isMethodFiltering()) {
				expandLevel++;
			}
			expandToLevel(expandLevel);
		}
		getTree().setRedraw(true);
	}	
	/**
	 * Content provider for the 'traditional' type hierarchy.
	 */	
	public static class TraditionalHierarchyContentProvider extends TypeHierarchyContentProvider {
		
			
		public TraditionalHierarchyContentProvider(TypeHierarchyLifeCycle provider) {
			super(provider);
		}
		
		public int getExpandLevel() {
			ITypeHierarchy hierarchy= getHierarchy();
			if (hierarchy != null) {