class Reference

1. 8.x drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Reference.php \Symfony\Component\DependencyInjection\Reference
2. 8.x drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Tests/Fixtures/Reference.php \Symfony\Component\Validator\Tests\Fixtures\Reference

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

AnalyzeServiceReferencesPassTest.php in drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php

bootstrap.inc in drupal/core/includes/bootstrap.inc

Functions that need to be loaded on every Drupal request.

CheckCircularReferencesPassTest.php in drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php

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

... See full list

class Reference {
  private $id;
  private $invalidBehavior;
  private $strict;

  /**
   * Constructor.
   *
   * @param string  $id              The service identifier
   * @param int     $invalidBehavior The behavior when the service does not exist
   * @param Boolean $strict          Sets how this reference is validated
   *
   * @see Container
   */
  public function __construct($id, $invalidBehavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, $strict = true) {
    $this->id = strtolower($id);
    $this->invalidBehavior = $invalidBehavior;
    $this->strict = $strict;
  }

  /**
   * __toString.
   *
   * @return string The service identifier
   */
  public function __toString() {
    return (string) $this->id;
  }

  /**
   * Returns the behavior to be used when the service does not exist.
   *
   * @return int
   */
  public function getInvalidBehavior() {
    return $this->invalidBehavior;
  }

  /**
   * Returns true when this Reference is strict
   *
   * @return Boolean
   */
  public function isStrict() {
    return $this->strict;
  }

}