GraphQL Filter with Array


I have installed Datahub GraphQL bundle. I am wondering with the multiple value filtered listing.
I am looking for productListing with Multiple SKU’s.


    getProductListing(defaultLanguage: "en", filter: "{\"sku\":  {\"$in\":  [\"AB-001\", \"CD-002\", \"EF-003\"]}}"){

But the above code is not working.

Any idea how I can customize it or any other way that out of the box.

Thanks in advance.