o365-2.0.3/modules/o365_outlook_mail/o365_outlook_mail.services.yml

services:
  logger.channel.o365_outlook_mail:
    parent: logger.channel_base
    arguments: ['o365_outlook_mail']
  o365_outlook_mail.get_mail:
    class: Drupal\o365_outlook_mail\GetMailService
    arguments: ['@o365.graph', '@date.formatter']