echoInterval:
                description: Configures the minimal echo receive transmission interval
                  that this system is capable of handling in milliseconds. Defaults
                  to 50ms
                format: int32
                maximum: 60000
                minimum: 10
                type: integer
              echoMode:

   * to hang (possibly too quickly, but too-quick failures should be very unlikely, given that we
   * used to bail after 20ms during the expected-successful tests, and there we saw a failure rate
   * of ~1/5000, meaning that the other thread's get() call nearly always completes within 20ms if
   * it's going to complete at all).
   *
   * <p>[*] To avoid hangs, I've disabled the in-thread calls. This makes the test take (very