/usr/lib/ubiquity/dm-scripts/oem/00-prime-offload is in nvidia-prime 0.8.2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #!/bin/sh
#
# Call prime-offload on the OEM installer so that offloading
# can temporarily work without Lightdm
#
/sbin/prime-offload
|