@IsTest
global class ParkServiceMock implements WebServiceMock {
    global void doInvoke(
           Object stub,
           Object request,
           Map<String, Object> response,
           String endpoint,
           String soapAction,
           String requestName,
           String responseNS,
           String responseName,
           String responseType){
               ParkService.byCountryResponse response_x=new ParkService.byCountryResponse();
               response_x.return_x=new String[]{'Ma','Ba','Gi'};
               response.put('response_x',response_x);
        }

}