symfony/tests/fixtures/Symfony/Components/DependencyInjection/includes/ProjectExtension.php

<?php

use Symfony\Components\DependencyInjection\BuilderConfiguration;
use Symfony\Components\DependencyInjection\Definition;
use Symfony\Components\DependencyInjection\Loader\LoaderExtension;

class ProjectExtension extends LoaderExtension
{
    public function barLoad(array $config, BuilderConfiguration $configuration)
    {
        $configuration->setDefinition('project.service.bar', new Definition('FooClass'));
        $configuration->setParameter('project.parameter.bar', isset($config['foo']) ? $config['foo'] : 'foobar');

        return $configuration;
    }

    public function getXsdValidationBasePath()
    {
        return false;
    }

    public function getNamespace()
    {
        return 'http://www.example.com/schema/project';
    }

    public function getAlias()
    {
        return 'project';
    }
}