BranchId missing

Hi, is there someone still giving maintenance to this gem?
I'd like to have BranchID in the method self.build_bank, as below:

acct.branch_id = (doc/"STMTRS/BANKACCTFROM/BRANCHID").inner_text

I need this because I have a case where there are two accounts with the same number but in different branches for a bank.

Thanks.
