docs: public RefreshCacheRequest withFolderList(String... folderList) {
          if (this.folderList == null) {
              setFolderList(new com.amazonaws.internal.SdkInternalList<String>(folderList.length));
          }
          for (String ele : folderList) {
              this.folderList.add(ele);
          }
          return this;
      }