Locale Subscriber to force Locale over API calls on Sylius

LocaleSubscriber.php

<?php

namespace AppBundle\EventSubscriber;

use Sylius\Component\Channel\Context\ChannelContextInterface;
use Sylius\Component\Core\Locale\LocaleStorageInterface;
use Sylius\Component\Locale\Context\LocaleContextInterface;
use Sylius\Component\Locale\Provider\LocaleProvider;
use Sylius\Component\Locale\Provider\LocaleProviderInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;

class LocaleSubscriber implements EventSubscriberInterface
{
    /**
     * @var LocaleContextInterface
     */
    protected $localeContext;
    /**
     * @var LocaleProvider
     */
    private $localeProvider;
    /**
     * @var LocaleStorageInterface
     */
    private $localeStorage;
    /**
     * @var ChannelContextInterface
     */
    private $channelContext;

    /**
     * @param LocaleContextInterface  $localeContext
     * @param LocaleProviderInterface $localeProvider
     * @param LocaleStorageInterface  $localeStorage
     * @param ChannelContextInterface $channelContext
     */
    public function __construct(LocaleContextInterface $localeContext, LocaleProviderInterface $localeProvider, LocaleStorageInterface $localeStorage, ChannelContextInterface $channelContext)
    {
        $this->localeContext  = $localeContext;
        $this->localeProvider = $localeProvider;
        $this->localeStorage = $localeStorage;
        $this->channelContext = $channelContext;
    }

    /**
     * Set the right locale via context.
     *
     * @param GetResponseEvent $event
     */
    public function onKernelRequest(GetResponseEvent $event)
    {
        $request = $event->getRequest();

        if (!$request->hasPreviousSession()) {
            return;
        }
        if ($locale = $request->attributes->get('_locale')) {
            $definedLocale = $this->localeContext->getLocaleCode() ? $this->localeContext->getLocaleCode() : $this->localeProvider->getDefaultLocaleCode();

            // check validity of locale
            if ($definedLocale !== $locale) {
                if (in_array($locale, $this->localeProvider->getAvailableLocalesCodes())) {
                    $request->setLocale($locale);
                    $this->localeStorage->set($this->channelContext->getChannel(), $locale);
                }
            }
        }
    }

    public static function getSubscribedEvents()
    {
        return [
            KernelEvents::REQUEST => [['onKernelRequest', 15]], // important, below than 16, after LocaleListener
        ];
    }
}

services.yml

services:
  app.subscriber.locale:
      class: AppBundle\EventSubscriber\LocaleSubscriber
      arguments: [ "@sylius.context.locale", "@sylius.locale_provider", "@sylius.storage.locale", "@sylius.context.channel" ]
      tags:
          - { name: kernel.event_subscriber }