Bug 184755 [DataBinding] internal tree content provider does not work
I broke the tree content providers while trying to update them to use TreePaths. It would be good to have a working implementation again...
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/internal/viewers/PrefetchingTree.java
private static IPrefetchingTree instance;
    private PrefetchingTree() {
    }
    public boolean shouldPrefetch(Object parentNode) {
        return true;
    }
    
    /**
     * @param treeProvider
     * @return a prefetching tree
     */
    public static IPrefetchingTree getPrefetchingTree(Object treeProvider) {
        if (treeProvider instanceof IPrefetchingTree) {
            return (IPrefetchingTree)treeProvider;
        }
        if (instance == null) {
            instance = new PrefetchingTree();
        }
        return instance;
    }
}