+ - RestSubReqFromXapp: The total number of Rest SubscriptionRequest messages received from xApp,
+ - RestSubRespToXapp: The total number of Rest SubscriptionResponse messages sent to xApp,
+ - RestSubFailToXapp: The total number of Rest SubscriptionFailure messages sent to xApp
+ - RestReqRejDueE2Down: The total number of Rest SubscriptionRequest messages rejected due E2 Interface down
+ - RestSubNotifToXapp: The total number of successful Rest SubscriptionNotification messages sent to xApp
+ - RestSubFailNotifToXapp: The total number of failure Rest SubscriptionNotification messages sent to xApp