service protected_pages.check_protected_page in Protected Pages 8

class: Drupal\protected_pages\EventSubscriber\ProtectedPagesSubscriber
arguments:
  - '@path_alias.manager'
  - '@current_user'
  - '@path.current'
  - '@redirect.destination'
  - '@request_stack'
  - '@protected_pages.storage'
  - '@page_cache_kill_switch'
tags:
  - { name: event_subscriber }