public function getFiles()
    {
        if (!in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
            return array();
        }

        $files = array();

        foreach ($this->fields->all() as $name => $field) {
            if ($field->isDisabled()) {
                continue;
            }

            if ($field instanceof Field\FileFormField) {
                $files[$name] = $field->getValue();
            }
        }

        return $files;
    }