Swagger-ui does not hide readOnly nested object from example body

I'm developing spring-boot app with swagger-ui and lombok. Currently I'm trying to hide nested object from request body, but it still shows in example json on swagger-ui page.

I have my class with annotations(simplified to only related stuff):

@Setter
@Getter
@ApiModel(description = "Character model")
public class Character {

    @ApiModelProperty(readOnly = true)
    private Long id;

    @ApiModelProperty(readOnly = true)
    private SearchAnnouncement searchAnnouncement;
}

When I access example model on swagger page "id" filed is properly hidden in example json, and visible in response model. But "searchAnnouncement" is not hidden in example json.

I tried:
using readOnly = true
using hidden = true
using accessMode = ApiModelProperty.AccessMode.READ_ONLY
using @Setter(AccessLevel.NONE), which prevents generation of setter for that field, as I read somewhere that something is checking if setter exist and sets readOnly based on that
different combinations of above
but in all cases example json looks like this (id hidden, and searchAnnouncement visible):

{
    "searchAnnouncement": {
         "id": 0,
    },
}

So in short my question is:
Is it possible to hide from example json nested object?

Q&A (please complete the following information)

• OS: [e.g. windows]
• Browser: [Chrome ]
• Version: [74]
• Swagger-UI version: [2.9.2]

Start with Swagger UI 2.9.2's example-body rendering for the supplied Character model and compare how top-level and nested readOnly properties are handled. Reproduce the shown schema with the listed annotations; done means searchAnnouncement is absent from the request example while remaining visible in the response model.