public function validateProperties(&$element, $properties = null, JsonPointer $path = null)
    {
        $undefinedConstraint = $this->factory->createInstanceFor('undefined');

        foreach ($properties as $i => $value) {
            $property = &$this->getProperty($element, $i, $undefinedConstraint);
            $definition = $this->getProperty($properties, $i);

            if (is_object($definition)) {
                // Undefined constraint will check for is_object() and quit if is not - so why pass it?
                $this->checkUndefined($property, $definition, $path, $i, in_array($i, $this->appliedDefaults));
            }
        }
    }