TypeMappingType mapType = (TypeMappingType)model.getExtensibilityElements().get(0);
WSDLToIDLAction idlgen = new WSDLToIDLAction();
idlgen.setBindingName("NillableCORBABinding");
idlgen.setOutputFile("nillable.idl");
idlgen.generateIDL(model);
Union un = (Union)mapType.getStructOrExceptionOrUnion().get(2);
assertEquals("Name is incorrect for Union Type", "long_nil",
un.getName());
assertEquals("Type is incorrect for Union Type", "PEl",