docs: public DescribeCacheEngineVersionsResult withCacheEngineVersions(CacheEngineVersion... cacheEngineVersions) {
          if (this.cacheEngineVersions == null) {
              setCacheEngineVersions(new com.amazonaws.internal.SdkInternalList<CacheEngineVersion>(cacheEngineVersions.length));
          }
          for (CacheEngineVersion ele : cacheEngineVersions) {
              this.cacheEngineVersions.add(ele);
          }
          return this;
      }