Unable to serialize using SerializationFeature.WRAP_ROOT_VALUE using Spring Boot

Question

I'm using Spring Boot 2.2.2 + Swagger2 v2.9.2 and I'm trying to achieve something really basic - I would like to serialize the REST responses using a SerializationFeature.WRAP_ROOT_VALUE.

I can't make it work!

I'm tried to do this:

spring.jackson.serialization.wrap-root-value=true

in my application.properties

and also tried to configure a bean using:

@Configuration
public class JacksonConfig {
    @Bean
    public Jackson2ObjectMapperBuilder jacksonBuilder() {
        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
        builder.featuresToEnable(SerializationFeature.WRAP_ROOT_VALUE); // enables wrapping for root elements
        return builder;
    }
}

But in both cases when I run the server it returns the Pojo without the root, but the weird thing is that SWAGGER gets broken when I use that configuration.

My POJO is really simple:

@JsonRootName(value = "user")
public class User {
    private long id;
    private String name;

    //getters and setters
}

I know there are many posts on this, but none of the solutions there seem to work for me...

Any one else have encountered this weird behaviour?