CacheBuilderFactory withExpireAfterAccesses(Set<DurationSpec> durations) {
    this.expireAfterAccesses = new LinkedHashSet<>(durations);
    return this;
  }

  @CanIgnoreReturnValue
  CacheBuilderFactory withRefreshes(Set<DurationSpec> durations) {
    this.refreshes = new LinkedHashSet<>(durations);
    return this;
  }

  @CanIgnoreReturnValue
  CacheBuilderFactory withKeyStrengths(Set<Strength> keyStrengths) {