import org.mapstruct.Mapper;
import org.mapstruct.ReportingPolicy;

/** The target record has a component (note) that the source does not have. */
@Mapper(unmappedTargetPolicy = ReportingPolicy.ERROR)
public interface BrokenMapper {

    record Src(String name, int qty) { }

    record Dst(String name, int qty, String note) { }

    Dst map(Src src);
}