title: What are setDefaults array options
body: <p>What are the options for setDefaults array (data_class and ...?). Where I can found it?</p>
  
  <pre><code>public function configureOptions(OptionsResolver $resolver)
  {
      $resolver-&gt;setDefaults(array(
          'data_class' =&gt; 'AppBundle\Entity\Task',
      ));
  }
  </code></pre>