Unable to set null example in model property with ModelPropertyBuilderPlugin

[lhannest]

I'm using version 2.9.2

I want an Integer model property to have a null value in the Swagger UI page.

But, no matter what I do the model property shows up as 0 on the Swagger UI page.

I tried creating a ModelPropertyBuilderPlugin that finds model properties with the following annotation:

@ApiNullExample
public Long nullableField;

And sets the builder's example to null:

@Component
@Order(SwaggerPluginSupport.SWAGGER_PLUGIN_ORDER + 1)
public class MyModelPropertyBuilderPlugin implements ModelPropertyBuilderPlugin {
    @Override
    public void apply(ModelPropertyContext context) {
        Optional<ApiNullExample> optional = findAnnotation(context, ApiNullExample.class);

        if (optional.isPresent()) {
            context.getBuilder().allowEmptyValue(true);
            context.getBuilder().example((Object) null);
        }
    }
    
    ... 

It does find the annotation, but then it's unable to set the example to null because the builder always takes the previous value (which another ModelPropertyBuilderPlugin that I have no control over has set to "") if the input is null.

Worse, even if I manually set the example to null in my debugger, it still shows up as 0 in the Swagger UI page.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had recent activity. Please re-open a new issue if this is still an issue.