code: public void add(BeanId beanId)
      {
          BeanId[] buckets = this.ivBuckets;
          buckets[(beanId.hashValue & 0x7FFFFFFF) % buckets.length] = beanId;
      }
docs: Adds the specified BeanId into the cache. Since the cache only contains
  one BeanId per hash table bucket, any previously added BeanId that has
  the same hash code will be dropped from the cache. <p>
  
  @param beanId the BeanId to add into the cache.