PSFT Creating a Standalone Rowset with Rows that have multiple records

TLDR: how do you create a standalone rowset where the row of the rowset has a primary record along with OTHER records.

In the component buffer, each row at each level of the rowset has a primary DB record, and then 1 to many other records (work records), along with child rowsets.

You can create a standalone rowset with multiple levels like this

Local Rowset &rsHierarchy = CreateRowset(RECORD.JOB, CreateRowset(RECORD.JOB_JR));

In this case, the top level of this rowset has a row with a JOB record, and then a child JOB_JR rowset.

How would you put an additional record in the top level, at the same LEVEL as the job RECORD (e.g., a work record);