How to handle OptionalInt parameters as integers in Swagger?

I found a solution :

In the configuration file I put a model converter

modelConverterClasses: 
- fr.data.openapi.WaPropertyConverter

in which I defined the schema to handle OptionalInt parameters :

import io.swagger.v3.core.converter.ModelConverter;

public class WaPropertyConverter implements ModelConverter {
    @Override
    public Schema<?> resolve(AnnotatedType type, ModelConverterContext context, Iterator<ModelConverter> chain) {
        if (type.getType() instanceof SimpleType) {
            SimpleType type_ = (SimpleType) type.getType();
            if (type_.isTypeOrSubTypeOf(OptionalInt.class))
                return optionalIntSchema();

        }
        if (chain.hasNext()) {
            return chain.next().resolve(type, context, chain);
        } else {
            return null;
        }
    }

    protected Schema<?> optionalIntSchema() {
        Schema<Integer> s = new Schema<Integer>();
        s.setType("integer");
        s.format("int32");
        return s;
    }
}

With this I get the correct schema for all my OptionalInt's

      - name: count
        in: query
        schema:
          type: integer
          format: int32