Bug 137435 [DataBinding] IdentityWrapper violates requirements for equals
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/internal/beans/ListenerSupport.java
/**
	 * @since 1.0
	 */
	 static class IdentityWrapper {
		final Object o;
		IdentityWrapper(Object o) {
			this.o = o;
		}
		public boolean equals(Object obj) {
			if(obj == null || obj.getClass()!=IdentityWrapper.class) {