Implementing batches in Hangfire.Postgresql

Tags: #<Tag:0x00007f550652c3c8> #<Tag:0x00007f550652c300>

We are using hangfire pro with batch support with a sqlserver. We want to switch to a PostgreSQL server.
I read in the documentation that only Hangfire.Sqlserver and Hangfire.Pro.Redis are supported. The documentation says the following:

There is nothing special for batches, but some new storage methods should be implemented.

What new storage methods should be implemented to make the postgresql storage work with batches?

Is there any documentation about this subject so i can implement it or is this not supported?

Is this not possible or allowed to be implemented on other storage providers?