There is no such a feature currently, you can only use the same source and transfer it to multiple targets, for example, copy database to multiple databases or database + file, etc...
in your case you want multiple sources to transfer to a single target.
The reason why i didnt do it is because i wanted to preserve the backup in a known format.
We can add a feature though to ease the use of the library to create multiple files for each database.
There is no such a feature currently, you can only use the same source and transfer it to multiple targets, for example, copy database to multiple databases or database + file, etc...
in your case you want multiple sources to transfer to a single target. The reason why i didnt do it is because i wanted to preserve the backup in a known format.
We can add a feature though to ease the use of the library to create multiple files for each database.