create performance max retail campaign

[va...@adcore.com]

Hello,

we are currently dealing with create new PMRC(performance max retail campaign) in Google Ads API.
we successfully able to create PMRC and connect it to merchant, but we can't find way in API  how to add default AssetGroup which connected to a merchant too.
Maybe it because of luck of documentation related to PMRC.

If we are creating PMRC from Google Ads UI one of the steps is  to create default AssetGroup connected to All products in Merchant Feed and we are unable to find this option in API.

Could someone point us to correct places in documentation or provide an example how to it should be. Thanks in advance.