Steps to reproduce the behavior: [edit this CarController and run test for it](https://github.com/springdoc/springdoc-openapi/blob/main/springdoc-openapi-tests/springdoc-openapi-groovy-tests/src/test/groovy/test/org/springdoc/api/app2/CarController.groovy) ```groovy package test.org.springdoc.api.app2 @RestController class CarController { test.org.springdoc.api.app2.CarService carService CarController(test.org.springdoc.api.app2.CarService carService) { this.carService = carService } @GetMapping(path = '/cars') List<test.org.springdoc.api.app2.Car> getCars(@ParameterObject CarsFilter filter) { return carService.getCars() } static class CarsFilter { String name } } ```