MediaFolderCollection example

$parent->setUpdatedAt(new \DateTime('2017-11-21T11:25:34.000+00:00'));
        $parent->internalSetEntityData('media_folder', new FieldVisibility([]));

        $child = new MediaFolderEntity();
        $child->setId('5846dd97529c0f6b5448713e352be2d8');
        $child->setChildCount(1);
        $child->setUseParentConfiguration(true);
        $child->setParentId('3e352be2d85846dd97529c0f6b544870');
        $child->setCreatedAt(new \DateTime('2012-08-15T00:00:00.000+00:00'));
        $child->setUpdatedAt(new \DateTime('2017-11-21T11:25:34.000+00:00'));
        $child->internalSetEntityData('media_folder', new FieldVisibility([]));
        $parent->setChildren(new MediaFolderCollection([$child]));

        return new MediaFolderCollection([$parent]);
    }

    /** * @return array<string, mixed> */
    protected function getJsonApiFixtures(string $baseUrl): array
    {
        return [
            'data' => [
                [