Using Setfit for similarity classification

Hello,
I would like to test this promising framework on a similarity classification task. So basically, I have got a dataset with 3 columns: (sentence1,sentence2,label). From what I understand, currently it is only possible to train on a single sentence classification problem.
Is there a get around to use Setfit for a pair sentence classification problem ? If not, would it be possible to add this feature in a future integration ?

Thank you in advance