public function cleanPhone($phone)
    {
        $response = $this->query($this->prepareUri('clean/phone'), [$phone]);
        $result = $this->populate(new Phone, $response);
        if (!$result instanceof Phone) {
            throw new RuntimeException('Unexpected populate result: ' . get_class($result). '. Expected: ' . Phone::class);
        }
        return $result;
    }