@Test
public void usingResourceProxy() throws Exception {
// given, when
final JsonRepresentation args = JsonRepresentation.newMap();
args.mapPut("str1.value", "IVA VENDITE 21%");
args.mapPut("str2.value", "AAA");
final Response response = serviceResource.invokeActionIdempotent("ActionsEntities", "concatenate", JsonNodeUtils.asInputStream(args));
final RestfulResponse<ActionResultRepresentation> restfulResponse = RestfulResponse.ofT(response);