@RequestMapping(value = "/map", method = RequestMethod.GET, produces = { MediaType.APPLICATION_JSON_VALUE })
public @ApiResponseObject
@ResponseBody
Map<String, City> map() {
Map<String, City> cities = new HashMap<String, City>();
cities.put("a", new City("Adelaide", 4322, 8));
cities.put("m", new City("Melbourne", 9080, 12));
cities.put("p", new City("Perth", 743534, 5));
cities.put("s", new City("Sydney", 54654, 32));
return cities;
}