old_contents: /**
   * @fileoverview Externs for JQuery UI
   *
   * @externs
   */
  
  
  
  /**
   * @constructor
   */
  function jQueryUI() {}
  
  
  /**
   * @type {jQuery}
   */
  jQueryUI.prototype.item;
  
  
  /**
  * @param {(string|Object.<string,*>)=} opt_options
  * @return {jQuery}
  */
  jQuery.prototype.sortable = function(opt_options) {};
  
new_contents: /**
   * @fileoverview Externs for JQuery UI
   *
   * @externs
   */
  
  
  
  /**
   * @constructor
   */
  function jQueryUI() {}
  
  
  /**
   * @type {jQuery}
   */
  jQueryUI.prototype.item;
  
  
  /**
  * @param {(string|Object.<string,*>)=} opt_options
  * @return {jQuery}
  */
  jQuery.prototype.sortable = function(opt_options) {};
  
  
  /**
  * @param {(string|Object.<string,*>)=} opt_options
  * @return {jQuery}
  */
  jQuery.prototype.datepicker = function(opt_options) {};
  
subject: Add extern for jQuery UI Datepicker