Bug 252117 [DataBinding] ListBinding does not update from model to target in some cases
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/internal/databinding/beans/JavaBeanObservableArrayBasedSetTest.java
PropertyChangeListener {
		int count;
		PropertyChangeEvent evt;
		/*
		 * (non-Javadoc)
		 * 
		 * @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent)
		 */
		public void propertyChange(PropertyChangeEvent evt) {
			count++;
			this.evt = evt;
		}
	}
	public static Test suite() {
		TestSuite suite = new TestSuite(JavaBeanObservableArrayBasedSetTest.class.getName());
		suite.addTestSuite(JavaBeanObservableArrayBasedSetTest.class);
		suite.addTest(MutableObservableSetContractTest.suite(new Delegate()));
		return suite;
	}
	static class Delegate extends AbstractObservableCollectionContractDelegate {