code: function(items, options) {
        options = options || {};
        return new Parse.Collection(items, _.extend(options, {
          model: this.objectClass,
          query: this
        }));
      }
docs: Returns a new instance of Parse.Collection backed by this query.
  @param {Array} items An array of instances of <code>Parse.Object</code>
  with which to start this Collection.
  @param {Object} options An optional object with Backbone-style options.
  Valid options are:<ul>
  <li>model: The Parse.Object subclass that this collection contains.
  <li>query: An instance of Parse.Query to use when fetching items.
  <li>comparator: A string property name or function to sort by.
  </ul>
  @return {Parse.Collection}