Ip\Internal\Grid\Model\Field\RepositoryFile::preview PHP Method

    public function preview($recordData)
    {
        if ($this->fileLimit == 1) {
            return esc($recordData[$this->field]);
        } else {
            $data = json_decode($recordData[$this->field]);
            if (is_array($data)) {
                $data = implode(', ', $data);
            }
            return esc($data);
        }
    }