@Override
    public Object getWrappedValue() {
        return predicate;
    }
@Test
    public void requireThatWrappedValueIsPredicate() {
        Predicate predicate = SimplePredicates.newPredicate();
        PredicateFieldValue value = new PredicateFieldValue(predicate);
        assertSame(predicate, value.getWrappedValue());
    }