title: When using the buildForm->add() function in Symfony2, What are the acceptable options?
body: <p>I have looked through the documentation and unless i've missed it I'm not able to find anything explaining what the official $options are for the buildForm->add() function in Symfony2. </p>
  
  <pre><code>public function buildForm(FormBuilder $builder, array $options)
  {
  
      $builder-&gt;add('fieldname1');        
      $builder-&gt;add('fieldname2', new formObjectType(), $arrayOptions);
  
  }
  </code></pre>
  
  <p>Taking the code above, what options would be passed in as an array for the second field. </p>
  
  <p>Thanks</p>