@Override
    public List<ValidationEvent> validate(Model model) {
        List<ValidationEvent> events = new ArrayList<>();
        for (Shape shape : model.getShapesWithTrait(XmlNamespaceTrait.class)) {
            validateTrait(shape, shape.expectTrait(XmlNamespaceTrait.class)).ifPresent(events::add);
        }

        return events;
    }
Validates that the xmlNamespace traits are applied correctly for structures.

<ul>
    <li>Validates that uri is valid.</li>
</ul>
smithy-model/src/main/java/software/amazon/smithy/model/validation/validators/XmlNamespaceTraitValidator.java