Custom BBIS Framework Part - Using built in transaction

I am trying to create a BBIS part and using the Transaction API to add a payment. The payment has to come in with a particular designation. The issue is the designation object on the PaymentArgs class only allows for designation or a backofficeid (which is an integer not a guid). obviously can't pass the guid into the backofficeid, and using the description and passing the name it goes into failed transaction saying there is no designation for a backofficeid of 0.

I am going to try creating a JSON object from the PaymentArgs class and sending it to the Donation REST API but it would be nice if I could use the correct assemblies.

Is this assembly just unsupported now? Blackbaud Internet Solutions | PaymentArgs.DesignationInfo Class

Comments