Bug 89606 [Viewers] Remove protected API added to support prototype of grouping by working sets
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* </p>
	 *
	 * @param elements
	 *            the array of expanded elements
	 * @see #getExpandedElements
	 */
	public void setExpandedElements(Object[] elements) {
		assertElementsNotNull(elements);
		if (checkBusy()) {
			return;
		}
		CustomHashtable expandedElements = newHashtable(elements.length * 2 + 1);
		for (int i = 0; i < elements.length; ++i) {
			Object element = elements[i];
			
			
			
			
			internalExpand(element, false);
			expandedElements.put(element, element);
		}
		
		
		
		
		internalSetExpanded(expandedElements, getControl());
	}
	/**
	 * Sets which nodes are expanded in this viewer's tree. The given list
	 * contains the tree paths that are to be expanded; all other nodes are to