Creating custom records via REST API, I am able to create the custom record but I have a case for custom record with a sublist of custom records, meaning their are custom records with a parent which is another custom record. When creating these custom records via suitescript we can create the custom record and the child/sublists records on the same call. Trying to see if their is a similar option via API instead of having to make a call for each child record separately. Attached are some screenshots for reference of the UI, SS version, and API version.