code: public java.util.List<ResourceKey> getUnprocessedResourceKeys() {
          if (unprocessedResourceKeys == null) {
              unprocessedResourceKeys = new com.amazonaws.internal.SdkInternalList<ResourceKey>();
          }
          return unprocessedResourceKeys;
      }
docs: <p>
  A list of resource keys that were not processed with the current response. The unprocessesResourceKeys value is
  in the same form as ResourceKeys, so the value can be directly provided to a subsequent BatchGetResourceConfig
  operation. If there are no unprocessed resource keys, the response contains an empty unprocessedResourceKeys
  list.
  </p>
  
  @return A list of resource keys that were not processed with the current response. The unprocessesResourceKeys
  value is in the same form as ResourceKeys, so the value can be directly provided to a subsequent
  BatchGetResourceConfig operation. If there are no unprocessed resource keys, the response contains an
  empty unprocessedResourceKeys list.