how to return multiple objects in SOAP webservice?

@Endpoint
@Validated
public class PerlasEndpoint {
    @Autowired
    PerlasService perlasService;
    private static final String SOAP_NAMESPACE="http://mycompany.lt/soap-web-service";

    @PayloadRoot(namespace = SOAP_NAMESPACE,localPart = "idCheckRequest")
    @ResponsePayload
    public PerlasCheckIdResponseDTO checkId(@Valid @RequestPayload PerlasCheckIdRequestDTO perlasCheckIdRequestDTO) {
        Optional<PerlasCheckIdResponseDTO> validationResult=perlasService.validateCheckIdRequest(perlasCheckIdRequestDTO, "CHECK ID");

        if (validationResult.isPresent()) {
            return validationResult.get();
        }

        PerlasCheckIdResponseDTO perlasCheckIdResponseDTO = perlasService.checkId(perlasCheckIdRequestDTO);

        return perlasCheckIdResponseDTO;
    }

    @PayloadRoot(namespace = SOAP_NAMESPACE, localPart = "saleRequest")
    @ResponsePayload
    public PerlasSaleResponseDTO createSale(@Valid @RequestPayload PerlasSaleRequestDTO perlasSaleRequestDTO) {
        PerlasSaleResponseDTO perlasSaleResponseDTO=perlasService.createSale(perlasSaleRequestDTO);

        return perlasSaleResponseDTO;
    }
}