docs: public int populateContentTypeCache(int limit) {
      if (limit > CONTENT_TYPE_LIMIT_MAX) {
        throw new IllegalArgumentException("Content types per page limit cannot be more then 1000.");
      }
      if (limit <= 0) {
        throw new IllegalArgumentException("Content types per page limit cannot be "
            + "less or equal to 0.");
      }
  
      return observeContentTypeCachePopulation(limit).blockingFirst();
    }