How to set up the annotation builder so it can use the hydrator manager

example.php

<?php

/*
 * This is the setup required to make an annotation builder able to load
 * a hydrator from annotation via the HydratorManager.
 */

$annotationBuilder = new \Zend\Form\Annotation\AnnotationBuilder();
$factory = new \Zend\Form\Factory($serviceLocator->get('FormElementManager'));
$annotationBuilder->setFormFactory($factory);               

$form = $annotationBuilder->createForm($myEntity);