Is it possible to isolate $apply operation from cqf-ruler and run it with fhir server.

[suriyan3]

I am running a servlet in a spring boot with fhir base server (hapi-fhir-jpaserver-starter). I just want to add $apply operation on PlanDefinition resource.
Is there a way I can use only this module from cqf-ruler and add to my servlet.