docs: public ClientFlakeIdGeneratorConfig setPrefetchCount(int prefetchCount) {
          checkTrue(prefetchCount > 0 && prefetchCount <= MAXIMUM_PREFETCH_COUNT,
                  "prefetch-count must be 1.." + MAXIMUM_PREFETCH_COUNT + ", not " + prefetchCount);
          this.prefetchCount = prefetchCount;
          return this;
      }