handler should point right back to that graph.
*/
public void testMultiUnionHasMultiUnionStatisticsHandler()
{
MultiUnion mu = new MultiUnion();
GraphStatisticsHandler sh = mu.getStatisticsHandler();
assertInstanceOf( MultiUnionStatisticsHandler.class, sh );
assertSame( mu, ((MultiUnionStatisticsHandler) sh).getUnion() );
}