PersonFilterType.php

            ->add("eyeColor", EntityType::class, [
                'required' => false,
                'class' => 'AppBundle\Entity\EyeColor',
                'placeholder' => 'Choose an eye color',
                "label" => "person.eyecolour",
                'query_builder' => function (EyeColourRepository $repo) {
                    return $repo->createAlphaEyeColours();
                },
            ])