symfony CollectionType类型字段子表单字段移除

工作中我们经常会遇到子表单字段移除工作，哪怎么移除提不想要的子表单字段呢。代码如下

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('stocks', CollectionType::class, [
                'label'         => false,
                'entry_type'    => ProductStockType::class,
                'entry_options' => [
                    'label' => false,
                ],
                'allow_delete'  => true,
            ])
        ;

        $builder->get('stocks')->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event){
            foreach ($event->getForm()->all() as $f)
                $f->remove('status');
        });
    }