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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\DependencyInjection;
  13  
  14  /**
  15   * IntrospectableContainerInterface defines additional introspection functionality
  16   * for containers, allowing logic to be implemented based on a Container's state.
  17   *
  18   * @author Evan Villemez <evillemez@gmail.com>
  19   */
  20  interface IntrospectableContainerInterface extends ContainerInterface
  21  {
  22      /**
  23       * Check for whether or not a service has been initialized.
  24       *
  25       * @param string $id
  26       *
  27       * @return bool true if the service has been initialized, false otherwise
  28       */
  29      public function initialized($id);
  30  }