simple_paypal_field-8.x-1.1/modules/paypal_field_example/paypal_field_example.services.yml

services:
  paypal_field_example.event_subscriber:
    class: Drupal\paypal_field_example\EventSubscriber\PayPalFieldExampleSubscriber
    arguments: ['@entity_type.manager']
    tags:
      - { name: event_subscriber }