acquia_commercemanager-8.x-1.122/modules/acm_checkout/acm_checkout.services.yml

services:
  plugin.manager.acm_checkout_flow:
    class: Drupal\acm_checkout\CheckoutFlowManager
    parent: default_plugin_manager

  plugin.manager.acm_checkout_pane:
    class: Drupal\acm_checkout\CheckoutPaneManager
    parent: default_plugin_manager