openfed-8.x-8.5/modules/openfed_features/openfed_administration/openfed_administration.install

<?php
/**
 * @file
 * Contains install and update functions for Openfed Administration.
 */

/**
 * Implements hook_install().
 */
function openfed_administration_install() {
  // Discover all the module configurations that we'll use to override existing
  // ones.
  $module = basename(__FILE__, '.install');
  $module_configs = \Drupal::configFactory()->listAll($module);

  // Overriding existing configurations.
  if (!empty($module_configs)) {
    foreach ($module_configs as $module_config_name) {
      $config = \Drupal::configFactory()->getEditable($module_config_name);
      // All the configurations set in this module starting with the module name
      // are overrides of the an already existing config. Here we'll get the
      // exiting config name.
      $existing_config = str_replace($module . '.', '', $module_config_name);
      $existing_config = \Drupal::configFactory()->getEditable($existing_config);
      $existing_config->setData($config->get())->save();
      // We don't need to keep this config.
      $config->delete();
    }
  }
}