Set customBackoff for AWS SDK JavaScript V3 retries

I just upgraded to AWS SDK V3 and I have no idea how to configure retryDelayOptions and customBackoff with it. I couldn't find any example code in AWS's own API reference or online. This is what I was doing previously:

retryDelayOptions: { customBackoff: (retryCount) => 2 ** (retryCount * 100) },maxRetries: 2

I was passing the above as options into the client constructor. The retries seems to have changed quite a bit with V3 and I cannot make sense of the API without any examples. Any help is much appreciated

Regards,Deepak