157         let backoff = Backoff::new();  in start_send()  localVariable
203                         backoff.spin();  in start_send()
216                 backoff.spin();  in start_send()
220                 backoff.snooze();  in start_send()
246         let backoff = Backoff::new();  in start_recv()  localVariable
285                         backoff.spin();  in start_recv()
306                 backoff.spin();  in start_recv()
310                 backoff.snooze();  in start_recv()
349             let backoff = Backoff::new();  in send()  localVariable
356                 if backoff.is_completed() {  in send()
359                     backoff.snooze();  in send()
409             let backoff = Backoff::new();  in recv()  localVariable
416                 if backoff.is_completed() {  in recv()
419                     backoff.snooze();  in recv()