Cleaner Symfony forms

CleanFormType.php

<?php
namespace AppBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

abstract class CleanFormType extends AbstractType
{
    private $formName;

    public function __construct($formName)
    {
        $this->formName = $formName;
    }

    public function getName()
    {
        return $this->formName;
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(
            $this->getDefaults()
        );
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $this->loadOptions($options);
        $this->build($builder);
    }
    
    protected function getDefaults()
    {
        return array();
    }

    /** @SuppressWarnings("unused") */
    protected function loadOptions(array $options)
    {
    }

    abstract protected function build(FormBuilderInterface $builder);
}

example-services.yml

services:
    acme_demo.form.type.task:
        class: AppBundle\Form\Type\TaskType
        arguments:
            - "task"
        tags:
            - { name: form.type, alias: task }