How to use the strapi/lib/load.loadFiles function in strapi

const loadPluginsGraphqlConfig = async installedPlugins => {
  const root = {};

  for (let pluginName of installedPlugins) {
    const pluginDir = loadUtils.findPackagePath(`strapi-plugin-${pluginName}`);

    const result = await loadUtils.loadFiles(
      pluginDir,
      'config/*.graphql?(.js)'
    );
    _.set(root, ['plugins', pluginName], result);
  }

  return root;
};

const loadApisGraphqlConfig = appPath =>
  loadUtils.loadFiles(appPath, 'api/**/config/*.graphql?(.js)');

const loadExtensions = async appPath =>
  loadUtils.loadFiles(appPath, 'extensions/**/config/*.graphql?(.js)');

const loadLocalPluginsGraphqlConfig = async appPath =>
  loadUtils.loadFiles(appPath, 'plugins/**/config/*.graphql?(.js)');