A Symfony Forms choice type of the US states

StatesType.php

<?php

/*
 * Installation:
 * =============
 * # services.yml
 * services:
 *     # ...
 *     acme.form.states:
 *       class: Acme\AcmeBundle\Form\Extension\StatesType
 *       tags:
 *         - { name: form.type, alias: acme.form.states }
 * 
 * Usage:
 * ======
 * $builder
 *     ->add("state", "acme.form.states")
 *     // ...
 */

namespace Acme\AcmeBundle\Form\Extension;

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

class StatesType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            "choices" => array(
                "Alabama" => "AL",
                "Alaska" => "AK",
                "Arizona" => "AZ",
                "Arkansas" => "AR",
                "California" => "CA",
                "Colorado" => "CO",
                "Connecticut" => "CT",
                "Delaware" => "DE",
                "Florida" => "FL",
                "Georgia" => "GA",
                "Hawaii" => "HI",
                "Idaho"=> "ID",
                "Illinois" => "IL",
                "Indiana" => "IN",
                "Iowa" => "IA",
                "Kansas" => "KS",
                "Kentucky" => "KY",
                "Louisiana" => "LA",
                "Maine" => "ME",
                "Maryland" => "MD",
                "Massachusetts" => "MA",
                "Michigan" => "MI",
                "Minnesota" => "MN",
                "Mississippi" => "MS",
                "Missouri" => "MO",
                "Montana" => "MT",
                "Nebraska" => "NE",
                "Nevada" => "NV",
                "New Hampshire" => "NH",
                "New Jersey" => "NJ",
                "New Mexico" => "NM",
                "New York" => "NY",
                "North Carolina" => "NC",
                "North Dakota" => "ND",
                "Ohio" => "OH",
                "Oklahoma" => "OK",
                "Oregon" => "OR",
                "Pennsylvania" => "PA",
                "Rhode Island" => "RI",
                "South Carolina" => "SC",
                "South Dakota" => "SD",
                "Tennessee" => "TN",
                "Texas" => "TX",
                "Utah" => "UT",
                "Vermont" => "VT",
                "Virginia" => "VA",
                "Washington" => "WA",
                "West Virginia" => "WV",
                "Wisconsin" => "WI",
                "Wyoming" => "WY"
            ),
            "choices_as_values" => true
        ));
    }

    /**
     * {@inheritdoc}
     */
    public function getParent()
    {
        return "choice";
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return "acme.form.states";
    }
}