Can the RTC Java Client Library be called from Jenkins Pipeline?

 So we've recently started adding some features to our Jenkins pipeline like setting the RTC build label in Jenkins to match what it would be from a Jazz build; adjusting the build snapshot name; etc. We currently have to do this by calling the APi code through a bat groovy call in the pipeline. Does anyone know if there's a way to add the API jars/libraries to the Jenkins classpath or include it somehow in the Shared Library so we don't have to resort to external calls, we can just use natively from Pipeline groovy scripts?