+sub displayable_type {
+ my $type = shift->type;
+
+ return $::locale->text('Sales Delivery Order') if $type eq 'sales_delivery_order';
+ return $::locale->text('Purchase Delivery Order') if $type eq 'purchase_delivery_order';
+
+ die 'invalid type';
+}
+
+sub displayable_name {
+ join ' ', grep $_, map $_[0]->$_, qw(displayable_type record_number);
+};
+