assert key != null;
        reportAccess(key, value);
        return value;
    }

    private void reportAccess(Object key, @Nullable Object value) {
        listener.onAccess(key, value);
    }

    private void reportAggregatingAccess() {
        // Mark all map contents as inputs if some aggregating access is used.
        delegate.forEach(this::reportAccess);
    }