Feature Request - On batch requests allow changing the changeset id

[kevindstanley1988]

At certain times we want to send a single batch post with 20 patch commands, they refer to 2 different sets of data, we need the first 10 to be in the same changeset and the second 10 to be in the second changeset. I may be missing something, but I dug through everything, i see you can change the batch boundary, but not the changeset, that would be a great feature! Thanks