@Value
@Builder
class RequestDto {
    String name;

    @Singular("addItem")
    List<String> items;

    List<String> moreItems;

    Set<String> setItems;
}

@Value
@Builder
class RequestBean {
    String name;
    List<String> items;
    List<String> moreItems;
    Set<String> setItems;
}


@Mapper(config = CentralConfig.class)
interface RequestMapper {
    RequestDto toDto(RequestBean requestBean);
}

// Generated Code

    @Override
    public RequestDto toDto(RequestBean requestBean) {
        if ( requestBean == null ) {
            return null;
        }

        RequestDto.RequestDtoBuilder requestDto = RequestDto.builder();

        if ( prechecksSupport.isNotBlank( requestBean.getName() ) ) {
            requestDto.name( requestBean.getName() );
        }
        if ( prechecksSupport.isNotEmpty( requestBean.getItems() ) ) {
            for ( String item : requestBean.getItems() ) {
                requestDto.addItem( item );
            }
        }
        if ( prechecksSupport.isNotEmpty( requestBean.getMoreItems() ) ) {
            for ( String moreItem : requestBean.getMoreItems() ) {
                requestDto.addItem( moreItem );
            }
        }

        return requestDto.build();
    }