The method and {HEAD ~ system} employ the technique of using alternate dispatch variables which can be provided with values naming the alternate objects to which the messages are to be dispatched upon failure of execution at {TAIL ~ the local object} 
The method and { HEAD ~ system } employ the technique of using alternate dispatch variables which can be provided with values naming the alternate objects to which the messages are to be dispatched upon failure of execution at { TAIL ~ the local object }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL