Use of APM mcget variables in iRule?

I'm interested of APM CCU usage, which can be found via APM VPE variable assign: [mcget -license {tmm.license.global_connectivity}].

 

Is there any direct way to retrieve this value via an irule instead of first assigning it to an APM session variable. The irule would be used in ACCESS_POLICY_COMPLETED event to log session establishment related information including current CCU usage. Would like use this single irule accross multiple access profiles, instead of adding variable assignments to each VPE separately.