notes/node_modules/is-extglob/index.js

/*!
 * is-extglob <https://github.com/jonschlinkert/is-extglob>
 *
 * Copyright (c) 2014-2015, Jon Schlinkert.
 * Licensed under the MIT License.
 */

module.exports = function isExtglob(str) {
  return typeof str === 'string'
    && /[@?!+*]\(/.test(str);
};