Bug 147530 [DataBinding] Provide event objects for change listeners
Before data binding goes 1.0 it would be wise to provide EventObjects for the following listeners to ensure that the API doesn't preclude future expansion of the values supplied to listeners. Interfaces that would be affected: * IValueChangeListener * IValueChangingListener * IListChangeListener * ISetChangeListener * IMappingChangeListener
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/AbstractObservable.java
/**
	 * 
	 */
	protected void lastListenerRemoved() {
	}
	/**
	 * 
	 */
	public synchronized void dispose() {
		changeListeners = null;
		staleListeners = null;
	}
	/**
	 * @return Returns the realm.
	 */
	public Realm getRealm() {
		return realm;
	}
	
	/**
	 * Asserts that the realm is the current realm.
	 * 
	 * @see Realm#isCurrent()
	 * @throws AssertionFailedException if the realm is not the current realm
	 */
	protected void checkRealm() {
		Assert.isTrue(realm.isCurrent());
	}
}