private boolean useCollectionUtility(Predicate<ValueAttribute> predicate) {
    for (ValueType n : nested) {
      if (Iterables.any(n.getSettableAttributes(), predicate)) {
        return true;
      }
    }
    return Iterables.any(getSettableAttributes(), predicate);
  }
Means object hashcode is cached at some point. Either lazily (on first access)
or eagerly (during construction).
@see #isUseLazyhash()
@see #isUsePrehashed()
value-processor/src/org/immutables/value/processor/meta/ValueType.java