TraversableObject.php

<?php

namespace Drupal\jsonapi_test_data_type;


/**
 * An object which implements \IteratorAggregate.
 */
class TraversableObject implements \IteratorAggregate {
    public $property = "value";
    
    /**
     * {@inheritdoc}
     */
    public function getIterator() {
        return new \ArrayIterator();
    }

}