group-8.x-1.x-dev/modules/group_support_revisions/group_support_revisions.services.yml

services:
  # Decorating group relation handlers.
  group.relation_handler_decorator.permission_provider.support_revisions:
    class: 'Drupal\group_support_revisions\Plugin\Group\RelationHandler\SupportRevisionsPermissionProvider'
    decorates: 'group.relation_handler.permission_provider'
    decoration_priority: 50
    arguments: ['@group.relation_handler_decorator.permission_provider.support_revisions.inner']