public function getResponseStrings()
    {
        $response = [];
        foreach (array_keys($this->pending) as $tableName) {
            $message = isset($this->titles[$tableName]) ? $this->titles[$tableName] . ' ' : '';
            if (!empty($this->messages[$tableName])) {
                $message .= implode(', ', $this->messages[$tableName]);
            }
            $response[$tableName] = $message;
        }
        ksort($response);

        return $response;
    }