Returns the Partner mapping for a Sender, Receiver and Warehouse. If the buyer is passed as an argument to this function, it will be added to the search criteria for the Partner mapping.
If no value was found in the Partner mapping with the passed key values, the transformation is aborted and an error is raised. Sender of the EDI message. Receiver of the EDI message. Warehouse of the EDI message. Buyer of the EDI message.