public TestbedTest() {
for (int i = 0; i < MAX_CONTACT_POINTS; i++) {
points[i] = new ContactPoint();
}
serializer = new PbSerializer(this, new SignerAdapter(this) {
@Override
public Long getTag(Body argBody) {
if (isSaveLoadEnabled()) {
if (argBody == groundBody) {
return GROUND_BODY_TAG;