arch-8.x-1.x-dev/modules/product/modules/group/arch_product_group.services.yml

services:
  product_group.handler:
    class: Drupal\arch_product_group\GroupHandler
    arguments:
      - '@database'
      - '@entity_type.manager'
      - '@module_handler'
      - '@language_manager'

  product_matrix:
    class: Drupal\arch_product_group\ProductMatrix
    arguments:
      - '@product_group.handler'
      - '@entity_type.manager'
      - '@current_user'
      - '@module_handler'
      - '@language_manager'