+use SL::DB::Manager::Buchungsgruppe;
+
+sub income_accno_id {
+ my ($self, $taxzone) = @_;
+ my $taxzone_id = ref $taxzone && $taxzone->isa('SL::DB::TaxZone') ? $taxzone->id : $taxzone;
+ my $method = 'income_accno_id_' . $taxzone_id;
+
+ return $self->$method;
+}
+
+sub expense_accno_id {
+ my ($self, $taxzone) = @_;
+ my $taxzone_id = ref $taxzone && $taxzone->isa('SL::DB::TaxZone') ? $taxzone->id : $taxzone;
+ my $method = 'expense_accno_id_' . $taxzone_id;