title: How to set the default choice for Symfony Form Builder EntityType Field
body: <p>I have an EntityType Field in my Symfony Form Builder. The buildForm method looks like this:</p>
  
  <pre><code>public function buildForm(FormBuilderInterface $builder, array $options)
  {
      $builder
          -&gt;add('title', TextType::class, array(
              'label' =&gt; 'Title',
              'attr' =&gt; array(
                  'class' =&gt; "form-control",
              ),
          ))
          -&gt;add('language', EntityType::class, array(
              'class' =&gt; Language::class,
              'label' =&gt; 'Language',
              'multiple' =&gt; false,
              'expanded' =&gt; false,
              'query_builder' =&gt; function(EntityRepository $entityRepository)
              {
                  return $entityRepository
                      -&gt;createQueryBuilder('l')
                      -&gt;where('l.inUse = true')
                      -&gt;andWhere('l.id &gt; 0');
              },
          ));
  }
  </code></pre>
  
  <p>As you can see, this creates a multiple selection field with all languages from my database available to pick from. However, I want to modify this so the specific language (for example ID = 12) will be always selected while creating new title. Can anyone tell me how to achieve this?</p>