docs: public DescribeCacheClustersResult withCacheClusters(CacheCluster... cacheClusters) {
          if (this.cacheClusters == null) {
              setCacheClusters(new com.amazonaws.internal.SdkInternalList<CacheCluster>(cacheClusters.length));
          }
          for (CacheCluster ele : cacheClusters) {
              this.cacheClusters.add(ele);
          }
          return this;
      }