DependencySerializationTrait::__sleep

public DependencySerializationTrait::__sleep()

public function __sleep() {
  $this->_serviceIds = array();
  $vars = get_object_vars($this);
  foreach ($vars as $key => $value) {
    if (is_object($value) && isset($value->_serviceId)) {
      // If a class member was instantiated by the dependency injection
      // container, only store its ID so it can be used to get a fresh object
      // on unserialization.
      $this->_serviceIds[$key] = $value->_serviceId;
      unset($vars[$key]);
    }
    // Special case the container, which might not have a service ID.
    elseif ($value instanceof ContainerInterface) {
      $this->_serviceIds[$key] = 'service_container';
      unset($vars[$key]);
    }
  }

  return array_keys($vars);
}