public boolean containsKey(@Nullable Object key) {
        return getAndReport(key) != null;
    }

    @Override
    public Set<String> keySet() {
        return new AccessTrackingSet<>(super.keySet(), trackingListener());
    }

    @Nullable
    @SuppressWarnings("SuspiciousMethodCalls")
    private String getAndReport(@Nullable Object key) {
        String result = delegate.get(key);

        return delegate.propertyNames();
    }

    @Override
    public Set<String> stringPropertyNames() {
        return new AccessTrackingSet<>(delegate.stringPropertyNames(), trackingListener());
    }

    @Override
    public int size() {
        reportAggregatingAccess();
        return delegate.size();
    }

    @Override
    public boolean isEmpty() {