code: @NonNull
    public Caffeine<K, V> recordStats() {
      requireState(this.statsCounterSupplier == null, "Statistics recording was already set");
      statsCounterSupplier = ENABLED_STATS_COUNTER_SUPPLIER;
      return this;
    }
docs: Enables the accumulation of {@link CacheStats} during the operation of the cache. Without this
  {@link Cache#stats} will return zero for all statistics. Note that recording statistics
  requires bookkeeping to be performed with each operation, and thus imposes a performance
  penalty on cache operation.
  
  @return this {@code Caffeine} instance (for chaining)