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define([], function() {
  /** Used as a safe reference for `undefined` in pre-ES5 environments. */  var undefined;
  /**   * Gets the value at `key`, unless `key` is "__proto__".   *   * @private   * @param {Object} object The object to query.   * @param {string} key The key of the property to get.   * @returns {*} Returns the property value.   */  function safeGet(object, key) {    return key == '__proto__'      ? undefined      : object[key];  }
  return safeGet;});