class A feature inherited_no_precondition do end inherited_true_precondition require true do end inherited_false_precondition require false do end inherited_some_precondition require Current.out /= out do end no_no_precondition do end no_true_precondition require true do end no_false_precondition require false do end no_some_precondition require Current.out /= out do end true_no_precondition do end true_true_precondition require true do end true_false_precondition require false do end true_some_precondition require Current.out /= out do end false_no_precondition do end false_true_precondition require true do end false_false_precondition require false do end false_some_precondition require Current.out /= out do end end