final GroupsRequestBuilders groupBuilders = new GroupsRequestBuilders(requestOptions);
final GroupMembershipsRequestBuilders membershipBuilders = new GroupMembershipsRequestBuilders(requestOptions);
// Create
Response<IdResponse<Integer>> response = REST_CLIENT.sendRequest(groupBuilders.create()
.input(group)
.build()).getResponse();
Assert.assertEquals(response.getStatus(), 201);
Integer createdId = response.getEntity().getId();
Assert.assertNotNull(createdId);