Collection.php

        /**
         * Applies a callback to a copy of all data in the collection
         * and returns the result.
         *
         * Overriden to load any data that has not yet been loaded.
         *
         * @param callback $filter The filter to apply.
         * @param array $options The available options are:
         *              - `'collect'`: If `true`, the results will be returned wrapped
         *              in a new Collection object or subclass.
         * @return array|object The filtered data.
         */
        public function map($filter, array $options = array()) {
                if (!$this->closed()) {
                        while($this->next()) {}
                }
                $data = parent::map($filter, $options);
                if ($options['collect']) {
                        $data->_model = $this->_model;
                }
                return $data;
        }