farm-2.x-dev/modules/core/entity/farm_entity.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the farm_entity module.
 */

/**
 * Implements hook_install().
 */
function farm_entity_install() {

  // Enforce entity reference integrity on the entity types we care about.
  $enforced_entity_types = [
    'asset',
    'data_stream',
    'file',
    'log',
    'quantity',
    'taxonomy_term',
    'user',
  ];
  \Drupal::configFactory()->getEditable('entity_reference_integrity_enforce.settings')->set('enabled_entity_type_ids', array_combine($enforced_entity_types, $enforced_entity_types))->save();
}