If a loss object
sends a request../ns-2/srm-adaptive.tclSRM/request/Adaptive::send-request
in its first round_,
then the agent, in the instance procedure
and set its instance variable closest_(requestor) to 1.
a loss object that
sends a repair../ns-2/srm-adaptive.tclSRM/repair/Adaptive::send-repair
in its first round_
will invoke the agent's instance procedure,
and set closest_(repairor) to 1.