How to use ApiListingScannerPlugin to add a web api? Could you offer a demo with version 3.0?

[yangliu817]

as title, SwaggerConfig impl implements ApiListingScannerPlugin with swagger2-3.0.x.
But some classes are annotated with @declaration

`
@configuration
public class SwaggerConfig implements ApiListingScannerPlugin {

@OverRide
public List apply(
DocumentationContext documentationContext) {
return Arrays.asList(buildLogin());
}

private ApiDescription buildLogin() {

    List<Parameter> parameters = new ArrayList<>();
    parameters.add(new ParameterBuilder()
            .description("用户名")
            .type(new TypeResolver()
                    .resolve(String.class))
            .name("username")
            .parameterType(QUERY_PARAMETER_TYPE)
            .parameterAccess(PARAMETER_ACCESS)
            .required(true)
            .modelRef(new ModelRef(MODEL_REF))
            .build());

    parameters.add(new ParameterBuilder().description("密码")
            .type(new TypeResolver()
                    .resolve(String.class))
            .name("password")
            .parameterType(
                    QUERY_PARAMETER_TYPE)
            .parameterAccess(
                    PARAMETER_ACCESS)
            .required(true)
            .modelRef(
                    new ModelRef(MODEL_REF))
            .build());

    return new ApiDescription("登录",
            "/login", "登录","登录",
            Collections.singletonList(new OperationBuilder(
                    new CachingOperationNameGenerator())
                    /** HTTP请求类型 */
                    .method(HttpMethod.POST)
                    .produces(Sets.newHashSet(
                            MediaType.APPLICATION_JSON_VALUE))
                    .summary("登录接口")
                    /** 方法描述 */
                    .notes("登录接口")
                    /** 归类标签 */
                    .tags(Sets.newHashSet("认证控制"))
                    .parameters(parameters)
                    .uniqueId("login")
                    .build()),
            false);
}

@Override
public boolean supports(DocumentationType documentationType) {
    return DocumentationType.OAS_30.equals(documentationType);
}

}
`