o365-2.0.3/modules/o365_groups/o365_groups.services.yml

services:
  o365_groups.groups:
    class: Drupal\o365_groups\GroupsService
    arguments: ['@o365.graph', '@cache.default', '@current_user', '@database']
  o365_groups.files_access:
    class: Drupal\o365_groups\Access\O365GroupsFilesControllerAccessCheck
    arguments: ['@request_stack', '@o365_groups.groups']
    tags:
      - { name: access_check, applies_to: _o365_groups_files_access }
  o365_groups.files:
    class: Drupal\o365_groups\GroupFilesService
    arguments: ['@o365.graph']