Return childJobId via REST API

Summary

Where can the childJobId be obtained?

Content

When executing a data or metadata import, I can have the job id/status returned via the rest api.  I can also obtain the high level job details.  However, I have not been able to figure out how to return the childjobid.  I'd like to use that to return the specific errors.  From the documentation:

GET     /HyperionPlanning/rest/{api_version}/applications/{application}/jobs/{jobIdentifier}/ childjobs/{childJobIdentifier}/details

Am I overlooking where this is returned?  I don't see the childjobid in the job status or job status details responses.

Thanks.