docs: public BatchGetResourceConfigResult withUnprocessedResourceKeys(ResourceKey... unprocessedResourceKeys) {
          if (this.unprocessedResourceKeys == null) {
              setUnprocessedResourceKeys(new com.amazonaws.internal.SdkInternalList<ResourceKey>(unprocessedResourceKeys.length));
          }
          for (ResourceKey ele : unprocessedResourceKeys) {
              this.unprocessedResourceKeys.add(ele);
          }
          return this;
      }