Sulu\Bundle\MediaBundle\DependencyInjection\ImageTransformationCompilerPass::process PHP Method

    public function process(ContainerBuilder $container)
    {
        if (!$container->hasDefinition(self::POOL_SERVICE_ID)) {
            return;
        }
        $definition = $container->getDefinition(self::POOL_SERVICE_ID);
        $taggedServices = $container->findTaggedServiceIds(self::TAG);
        foreach ($taggedServices as $id => $tags) {
            foreach ($tags as $attributes) {
                $definition->addMethodCall('add', [new Reference($id), $attributes['alias']]);
            }
        }
    }