o365-2.0.3/modules/o365_outlook_calendar/o365_outlook_calendar.services.yml

services:
  o365_outlook_calendar.save_event:
    class: Drupal\o365_outlook_calendar\OutlookCalendarSaveEventService
    arguments:
      [
        '@o365.graph',
        '@config.factory',
        '@email.validator',
        '@messenger',
        '@entity_field.manager',
      ]