: $self->{vendor_id}   ? SL::DB::Vendor     ->new(id => $self->{vendor_id})  ->load->payment
               :                        croak("Missing field in \$::form: payment_id, customer_id or vendor_id");
 
               : $self->{vendor_id}   ? SL::DB::Vendor     ->new(id => $self->{vendor_id})  ->load->payment
               :                        croak("Missing field in \$::form: payment_id, customer_id or vendor_id");