}

    private <T> T processSet(Set<?> set, ValueVisitor<T> visitor) {
        ImmutableSet.Builder<T> builder = ImmutableSet.builderWithExpectedSize(set.size());
        for (Object element : set) {
            builder.add(processValue(element, visitor));
        }
        return visitor.set(builder.build());
    }

    private <T> T processList(List<?> value, ValueVisitor<T> visitor) {
        if (value.isEmpty()) {