src/NodePub/Common/Collections/TaggedCollection.php
protected function expand()
    {
        foreach ($this as $key => $item) {
            $item['slug'] = $key;

            if (isset($item['date'])) {
                $item['formatted_date'] = date(self::DATE_FORMAT, $item['date']);
            }

            $this->set($key, $item);
        }
    }
protected function expand()
    {
        foreach ($this as $key => $item) {
            $item['slug'] = $key;

            if (isset($item['date'])) {
                $item['formatted_date'] = date(self::DATE_FORMAT, $item['date']);
            }

            $this->set($key, $item);
        }
    }
Expands each collection item with extra data