use Symfony\Component\Notifier\Message\SmsMessage;
use Symfony\Component\Notifier\Bridge\Plivo\PlivoOptions;

$sms = new SmsMessage('+1411111111', 'My message');

$options = (new PlivoOptions())
    ->log(true)
    ->method('POST')
    ->url('url')
    ->mediaUrls('media_urls')
    ->powerpackUuid('uuid')
    ->trackable(true)
    ->type('sms')
    // ...
    ;

// Add the custom options to the sms message and send the message
$sms->options($options);

$texter->send($sms);