protected function renderKeyValuePair($key, $value)
    {
        $output = [];
        $value = $this->normalizeValue($value);

        if (is_array($value)) {
            foreach ($value as $v) {
                $output[] = sprintf('%s[] = %s', $key, $v);
            }
        } else {
            $output[] = sprintf('%s = %s', $key, $value);
        }

        return $output;
    }