error_service_test.services.yml

services:
  http_middleware.monkeys:
    class: Drupal\error_service_test\MonkeysInTheControlRoom
    tags:
      - { name: http_middleware, priority: 400 }
  # Set up a service with a missing class dependency.
  broken_class_with_missing_dependency:
    class: Drupal\error_service_test\LonelyMonkeyClass