interface ExtensionInterface

BundleInterface.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Bundle/BundleInterface.php

ContainerBuilder.php in drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/ContainerBuilder.php

Extension.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/DependencyInjection/Extension.php

ProjectExtension.php in drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/ProjectExtension.php

interface ExtensionInterface {

  /**
   * Loads a specific configuration.
   *
   * @param array            $config    An array of configuration values
   * @param ContainerBuilder $container A ContainerBuilder instance
   *
   * @throws InvalidArgumentException When provided tag is not defined in this extension
   *
   * @api
   */
  public function load(array $config, ContainerBuilder $container);

  /**
   * Returns the namespace to be used for this extension (XML namespace).
   *
   * @return string The XML namespace
   *
   * @api
   */
  public function getNamespace();

  /**
   * Returns the base path for the XSD files.
   *
   * @return string The XSD base path
   *
   * @api
   */
  public function getXsdValidationBasePath();

  /**
   * Returns the recommended alias to use in XML.
   *
   * This alias is also the mandatory prefix to use when using YAML.
   *
   * @return string The alias
   *
   * @api
   */
  public function getAlias();

}