custom_field-1.0.x-dev/modules/custom_field_graphql/custom_field_graphql.services.yml

services:
  Drupal\custom_field_graphql\Hook\CustomFieldGraphqlHooks:
    class: Drupal\custom_field_graphql\Hook\CustomFieldGraphqlHooks
    autowire: true
    arguments:
      - '@plugin.manager.custom_field_type'