When true, this import's run is placed at the front of the processing queue so it is picked up ahead of other Multi FileFeed imports already waiting in the queue. Omit it or send false to use the default first-in, first-out ordering.

This option must be enabled for your organization. If it is not enabled and you send true, the request is rejected with a 403 and no run is scheduled.

Front-of-queue ordering only affects imports that are still waiting. It does not preempt runs that are already executing and does not bypass concurrency limits, so a prepended run still waits its turn against any active throttle.