wherein the client device and {TAIL ~ the application} operate agnostic to {HEAD ~ existence} of the application extender 
wherein the client device and { TAIL ~ the application } operate agnostic to { HEAD ~ existence } of the application extender
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH