*/
public abstract class BroadcastDispatch<T> extends AbstractBroadcastDispatch<T> {
    private BroadcastDispatch(Class<T> type) {
        super(type);
    }

    public static <T> BroadcastDispatch<T> empty(Class<T> type) {
        return new EmptyDispatch<T>(type);
    }

    public Class<T> getType() {
        return type;

        def listener3 = Mock(Dispatch)

        expect:
        def dispatch1 = BroadcastDispatch.empty(TestListener)
        dispatch1.remove(listener1).is(dispatch1)

        def dispatch2 = BroadcastDispatch.empty(TestListener).add(listener1)
        dispatch2.remove(listener2).is(dispatch2)

        def dispatch3 = BroadcastDispatch.empty(TestListener).add(listener1).add(listener2)
        dispatch3.remove(listener3).is(dispatch3)