How to use the extend.extend function in extend

var div, extend, extendAttrs, pipe, see, setAutoWidth, text, _ref, _ref1;

_ref = require('lazy-flow'), see = _ref.see, pipe = _ref.pipe;

extend = require('extend').extend;

_ref1 = require('../core/tag'), text = _ref1.text, div = _ref1.div;

extendAttrs = require('../core/property').extendAttrs;

exports.setAutoWidth = setAutoWidth = function(container, options) {
  var initialWidth, inputAttrs, inputComponent, inputEventHandler, inputEvents, inputText$, inputTextWidth$, spaceWidth, testSubject, testSubjectStyle;
  if (options == null) {
    options = {};
  }
  initialWidth = options.initialWidth || 48;
  spaceWidth = options.spaceWidth || 40;
  inputTextWidth$ = see(initialWidth);
  inputEvents = options.inputEvents || "onkeydown";
  inputComponent = options.inputComponent || container.children[0];
  inputText$ = see("");

/** @module accordion
 * @directive accordion
 */
var Component, a, accordion, accordionGroup, div, each, exports, extend, extendAttrs, h4, img, span, _ref;

extend = require('extend').extend;

each = require('../core/instantiate').each;

_ref = require('../core/tag'), div = _ref.div, h4 = _ref.h4, a = _ref.a, span = _ref.span, img = _ref.img;

extendAttrs = require('../core/property').extendAttrs;

Component = require('../core/base/Component').Component;

module.exports = exports = accordion = function(attrs, accordionGroupList, options) {
  var accordionOptions, comp;
  attrs = extendAttrs({
    "class": "panel-group"
  }, attrs || {});
  accordionOptions = options || {};
  return comp = div(attrs, each(accordionGroupList, function(group, index) {