Bug 190061 [Metadata] Update @since tags for new API
Patch to follow
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/provisional/viewers/UnorderedTreeContentProvider.java
}
    
    /**
     * @return aouesnth
     */
    public IObservableSet getKnownElements() {
        return elements;
    }
    
     void changeStale(int staleDelta) {
        staleCount += staleDelta;
        processPrefetches();
        elements.setStale(staleCount != 0);
    }
    /**
     * @return aoueesnth      
     */
    public TreeViewer getViewer() {
        return treeViewer;
    }
    /**
     * @param element
     * @return aoeusnth
     */
    public boolean isDirty(Object element) {
        return false;
    }
     void enqueuePrefetch(TreeNode node) {
        if (maxPrefetches > 0 || maxPrefetches == -1) {
            if (staleCount == 0) {