List<RequiredFields> frjoinRequiredFields = frjoin.getRequiredFields();
assertTrue(frjoinRequiredFields.size() == 2);
requiredField = frjoinRequiredFields.get(0);
assertTrue(requiredField.needNoFields() == false);
assertTrue(requiredField.needAllFields() == true);
assertTrue(requiredField.getFields() == null);
requiredField = frjoinRequiredFields.get(1);
assertTrue(requiredField.needNoFields() == false);
assertTrue(requiredField.needAllFields() == true);