ProfileType:
class ProfileType extends BaseType {

    public function buildForm(FormBuilderInterface $builder, array $options) {

        parent::buildForm ( $builder, $options );
        $builder->remove( "username" );
        $builder->add( "name" );
        $builder->add("addresses", "collection", array("type" => new AddressType()));
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'PeterGaretyPublishing\UserBundle\Entity\User',
        ));
    }

    public function getName() {
        return "pgport_user_profile";
    }

}




AddressType:
class AddressType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('address');
        $builder->add('city');
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'PeterGaretyPublishing\UserBundle\Entity\Address',
        ));
    }

    public function getName()
    {
        return 'pgport_user_address';
    }
}