[SF][SF3] Id formularza i kontrolek Opcje

[nospor]

Hejka, tworze sobie klase do forma, ktory nie bedzie korzystal z zadnej encji, tylko bedzie mial pola zdefiniowane przeze mnie

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class JsonType extends AbstractType
{
    protected $textAreaOptions = [
        'label' => false,
        'attr' => [
            'rows' => 8,
        ]
    ];
 
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('source', TextareaType::class, $this->textAreaOptions)
            ->add('destination', TextareaType::class, $this->textAreaOptions);
    }
}
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oraz w kontrolerze:

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$form = $this->createForm(jsonType::class,[], ['attr' => ['id' => 'json_decode']]);
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Kod jaki mi to generuje to:

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<form class="form-horizontal" id="json_decode" method="post" name="json">
    <div id="json">    <div class="form-group"><div class="col-sm-12"><textarea class="form-control" rows="8" required="required" name="json[source]" id="json_source"></textarea></div></div>    <div class="form-group"><div class="col-sm-12"><textarea class="form-control" rows="8" required="required" name="json[destination]" id="json_destination"></textarea></div></div><input type="hidden" value="wXUTKqW3pb4wdOF88k2d-S0pn1sw0M0dxvdBa44CsGc" class="form-control" name="json[_token]" id="json__token"></div>
    </form>
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O ile id forma sie zgadza czyli json_decode to niestety juz id pol nie:id="json_source"
a chcialbym: id="json_decode_source"

Idzie to jakos odgornie ustawic? Googlam i szperam i marnie.