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