question: public void cancel ( ) { synchronized ( lock ) { if ( this . latency == NO_TARGET ) { throw new IllegalStateException ( "Request already" + " cancelled" ) ; } if ( ! requests . remove ( this ) ) { throw new InternalError ( "Latency request " + this + " not found" ) ; } if ( requests . isEmpty ( ) ) requests = null ; this . latency = NO_TARGET ; adjustLatencyIfNeeded ( ) ; } }
target:  Cancels this latency request.