final GroupsBuilders groupBuilders = new GroupsBuilders(requestOptions);
final GroupMembershipsBuilders membershipBuilders = new GroupMembershipsBuilders(requestOptions);
// Create
Response<EmptyRecord> response = REST_CLIENT.sendRequest(groupBuilders.create()
.input(group)
.build()).getResponse();
Assert.assertEquals(response.getStatus(), 201);
@SuppressWarnings("unchecked")
CreateResponse<Integer> createResponse = (CreateResponse<Integer>) response.getEntity();