Пустое поле Тип данных в springfox swagger ui

У меня есть приложение Spring Web MVC с сервисами отдыха, и я стараюсь использовать Springfox для автоматических документов для него.Пустое поле Тип данных в springfox swagger ui

Я использую

io.springfox:springfox-swagger2:2.5.0 
io.springfox:springfox-swagger-ui:2.5.0 
org.webjars:swagger-ui:2.1.4

Мои SwaggerConfig:

@Configuration 
@EnableSwagger2 
@Profile("dev") 
public class SwaggerConfig { 
    @Bean 
    public Docket api() { 
     Docket docket = new Docket(DocumentationType.SWAGGER_2) 
       .select() 
       .apis(RequestHandlerSelectors.any()) 
       .paths(PathSelectors.any()) 
       .build().apiInfo(apiInfo()); 
     return docket; 
    } 
}

И:

@Configuration 
@EnableWebMvc 
@Profile("dev") 
public class SwaggerWebMvcConfig extends WebMvcConfigurerAdapter { 
    @Override 
    public void addResourceHandlers(ResourceHandlerRegistry registry) { 
     registry.addResourceHandler("swagger-ui.html") 
       .addResourceLocations("classpath:/META-INF/resources/"); 

     registry.addResourceHandler("/webjars/**") 
       .addResourceLocations("classpath:/META-INF/resources/webjars/"); 
    } 
}

У меня есть контроллер отдыха:

@Api 
@RestController 
@RequestMapping(RegistrationRestController.ROOT_PATH) 
public class RegistrationRestController { 
    private final static Logger log = LogManager.getLogger(RegistrationRestController.class); 
    public static final String ROOT_PATH = "/rest/registration"; 

    private final ResponseUtil responseUtil; 
    private final UserService userService; 

    @Autowired 
    public RegistrationRestController(ResponseUtil responseUtil, UserService userService) { 
     log.debug("Instantiate RegistrationRestController bean"); 
     this.responseUtil = Objects.requireNonNull(responseUtil); 
     this.userService = Objects.requireNonNull(userService); 
    } 

    @RequestMapping(value = {""}, method = RequestMethod.POST) 
    @ApiResponses({ 
     @ApiResponse(code = 200, message = "Create new user and authorize them. Returns access token", response = AccessTokenDTO.class) 
    }) 
    @ApiOperation(value = "Create new user", response = AccessTokenDTO.class) 
    public ResponseDTO newUserRegistration(@Valid @ApiParam(required = true) RegistrationDTO registrationDTO) { 
     log.debug("POST {} with registrationDTO='{}'", ROOT_PATH, registrationDTO.toString()); 

     AccessTokenDTO accessToken = userService.createUserAndAuthorize(registrationDTO); 

     return responseUtil.wrapResult(accessToken); 
    } 
}

И RegistrationDTO:

@ApiModel 
public class RegistrationDTO { 
    @NotNull(message = "registrationDTO.phone.notNull.fail") 
    @Pattern(regexp = "[0-9]{10}", message = "registrationDTO.phone.pattern.fail") 
    private String phone; 
    @NotNull(message = "registrationDTO.email.notNull.fail") 
    @Email(message = "registrationDTO.email.pattern.fail") 
    private String email; 
    @NotNull(message = "registrationDTO.lastName.notNull.fail") 
    @Size(min = 1, message = "registrationDTO.lastName.size.fail") 
    private String lastName; 
    @NotNull(message = "registrationDTO.firstName.notNull.fail") 
    @Size(min = 1, message = "registrationDTO.firstName.size.fail") 
    private String firstName; 
    @NotNull(message = "registrationDTO.password.notNull.fail") 
    @Size(min = 6, message = "registrationDTO.password.size.fail") 
    private String password; 
    @NotNull(message = "registrationDTO.passwordConfirmation.notNull.fail") 
    @Size(min = 6, message = "registrationDTO.passwordConfirmation.size.fail") 
    private String passwordConfirmation; 

    @AssertTrue(message = "registrationDTO.isPasswordMatch.fail") 
    public boolean isPasswordMatch() { 
     return Objects.equals(password, passwordConfirmation); 
    } 

    public String getPhone() { 
     return phone; 
    } 

    public void setPhone(String phone) { 
     this.phone = phone; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public String getPasswordConfirmation() { 
     return passwordConfirmation; 
    } 

    public void setPasswordConfirmation(String passwordConfirmation) { 
     this.passwordConfirmation = passwordConfirmation; 
    } 

    @Override 
    public String toString() { 
     return "RegistrationDTO{" + 
       "phone='" + phone + '\'' + 
       ", email='" + email + '\'' + 
       ", lastName='" + lastName + '\'' + 
       ", firstName='" + firstName + '\'' + 
       '}'; 
    } 
}

Но когда я открываю Localhost: 8080/чванство-ui.html я вижу пустой тип данных для параметра RegistrationDTO.