Bug 135284 [Viewers] API: need to add methods to StructuredViewer to support ViewerComparator
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerSorter.java
*/
    public ViewerSorter() {
        this(Collator.getInstance());
    }
    /**
     * Creates a new viewer sorter, which uses the given collator
     * to sort strings.
     *
     * @param collator the collator to use to sort strings
     */
    public ViewerSorter(Collator collator) {
        this.collator = collator;
    }
    /**
     * Returns the collator used to sort strings.
     *
     * @return the collator used to sort strings
     */
    public Collator getCollator() {
        return collator;
    }
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerComparator#getComparator()
	 */
	protected Comparator getComparator() {
		return getCollator();
	}
}