Symfony locale listener configuration

services.yml

parameters:
    acme_i18n.listener.locale_listener.class: Acme\Bundle\I18nBundle\EventListener\LocaleListener

services:
    acme_i18n.listener.locale_listener:
        class: %acme_i18n.listener.locale_listener.class%
        arguments: [ @service_container, "%locales%" ]
        tags:
            - { name: kernel.event_listener, event: kernel.request, method: onKernelRequest, priority: -255 }