generating, in {TAIL ~ the computing device}, {HEAD ~ an identifier} that is associated with the lock on the first feature instance and returning the identifier to the client 
in
generating , in { TAIL ~ the computing device } , { HEAD ~ an identifier } that is associated with the lock on the first feature instance and returning the identifier to the client
OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH