The customer needs the tactical assertion named Delay for use on API GW 9.3.00 or API GW 9.4 CR5 (software installation) in production environment.
Release : 9.4
Component : API GATEWAY
This particular assertion has actually been open-sourced and you can obtain it from the location below:
The instructions are on the page I linked to.
In this case run "gradle build" and then the name of the package you are installing. If you are unfamiliar with gradle, you can familiarize with that tool here: