docs: private void recordClockSkew(long responseTimestamp) {
      if (responseTimestamp == 0L) {
        logger.debug("no date timestamp on response, cannot record skew");
      } else {
        final long delta = clock().wallTime() - responseTimestamp;
        if (delta >= 0L) {
          // Local clock is running fast compared to the server. Note this should also be the
          // common case for if the clocks are in sync as there will be some delay for the server
          // response to reach this node.
          timer(CLOCK_SKEW_TIMER, "id", "fast").record(delta, TimeUnit.MILLISECONDS);
        } else {
          // Local clock is running slow compared to the server. This means the response timestamp
          // appears to be after the current time on this node. The timer will ignore negative
          // values so we negate and record it with a different id.
          timer(CLOCK_SKEW_TIMER, "id", "slow").record(-delta, TimeUnit.MILLISECONDS);
        }
        logger.debug("clock skew between client and server: {}ms", delta);
      }
    }