I'm using addFeatures in the REST API to add data to my table and it's working great. However... one of the fields in my data is a Related Record. I can query the Related Record fine using queryRelatedRecords, but Is there some way I can add related records via addFeatures? There doesn't seem to be an addRelatedRecords entrypoint. Here's what I would pass to addFeatures in my dream world...
$ev = (object)[
'attributes' => (object)[
'EVENTNAME' => 'test',
'eventlocations' => list_of_locations_somehow?
],
];