private NullModel createTestModel() {
NullModel model = new NullModel();
model.setId(20);
model.setValue("test");
SubModel sub1 = new SubModel();
sub1.setId("sub1");
sub1.setName("test1");
SubModel sub2 = new SubModel();
sub2.setId("sub2");
sub2.setName("test2");
model.setSubs(Arrays.asList(sub1, sub2));
ModelWrapper wrapper = ModelWrapper.wrap(model);
wrapper.addOpenEngSBModelEntry(new OpenEngSBModelEntry("test", "test", String.class));
wrapper.addOpenEngSBModelEntry(new OpenEngSBModelEntry("test2", "test2", String.class));
return model;