@Override
            public void onAccess(@Nullable Object o) {
                getAndReport(Objects.requireNonNull(o));
            }

            @Override
            public void onAggregatingAccess() {
                reportAggregatingAccess();
            }

            @Override
            public void onRemove(@Nullable Object object) {
                // Environment variables are immutable.

 *
 * @param <E> the type of elements
 */
class AccessTrackingSet<E> extends ForwardingSet<E> {
    public interface Listener {
        void onAccess(@Nullable Object o);

        void onAggregatingAccess();

        void onRemove(@Nullable Object object);

        void onClear();
    }

        then:
        0 * listener._
    }

    def "method #methodName is reported as aggregating"() {
        when:
        operation.accept(set)

        then:
        (1.._) * listener.onAggregatingAccess()
        0 * listener._

        where:
        methodName            | operation
        "iterator()"          | call(s -> s.iterator())
        "toArray()"           | call(s -> s.toArray())

            @Override
            public void onAccess(@Nullable Object o) {
                getAndReportAccess(o);
            }

            @Override
            public void onAggregatingAccess() {
                reportAggregatingAccess();
            }

            @Override
            public void onRemove(@Nullable Object object) {
                reportRemoval(Objects.requireNonNull(object));