return (startTime == 0L) ? 1L : startTime;
    }
  }

  /**
   * Returns the remaining nanos until the given timeout, or 0L if the timeout has already elapsed.
   * Caller must have previously sanitized timeoutNanos using toSafeNanos.
   */
  private static long remainingNanos(long startTime, long timeoutNanos) {
    // assert timeoutNanos == 0L || startTime != 0L;

    // TODO : NOT CORRECT, BUT TESTS PASS ANYWAYS!