Is it possible to put multiple Representations into a single AdaptationSet?

[deppischCode]

Hello community,

thank you very much for reading my question, and if you're a contributor to this project thank you for your awesome work.
I have the following client-php for generating a dash compatible .mpd file as well as .m4s files:

use Streaming\FFMpeg;
use Streaming\Format\X264;
use Streaming\Representation;

$rep = new Representation();

$ffmpeg = FFMpeg::create();
$video = $ffmpeg->open('path/to/input.mp4');

$format = new X264();

$r_360p = (new Representation())->setKiloBitrate(800)->setAudioKiloBitrate(128)->setResize(640, 360);
$r_1080p = (new Representation())->setKiloBitrate(2500)->setAudioKiloBitrate(192)->setResize(1920, 1080);

$video->dash()
->setFormat($format)
->addRepresentations([$r_360p, $r_1080p])
->save('path/to/output.mpd');

// Alternatively, I tried this version,
// but the output was similar to the method-chain-call from above:

$video->dash()
->setFormat($format)
->addRepresentation($r_360p)
->addRepresentation($r_1080p)
->save('path/to/output.mpd');

This produces an .mpd file, which wraps each Representation into a single AdaptationSet, like this:

So with PHP-FFmpeg-video-streaming, is it possible to wrap more than one Representation into a single AdaptationSet? Like:

I am very much looking forward to receiving a reply. Thank you very much in advance!
Nico