RAF CSAS - seeking video to a particular timestamp

When using CSAS to stitch and render a stream, RAF is responsible for the video playback, so the channel doesn't have direct access to a normal video node doing the playback.  Does RAF provide an interface for seeking the video (or similar actions)?  I'm particularly interested in seeking, to enable users to "resume watching" a video they stopped midstream in a previous session.  Since this is a mandatory feature per the certification checklist, it seems like there must be a way to do it, but the CSAS documentation doesn't seem to cover it.  Thanks for your help!