AEM QueryBuilder: How to use contentfragment property?
I was going through the documentation of predicates supported in querybuilder API: https://experienceleague.adobe.com/docs/experience-manager-65/developing/platform/query-builder/querybuilder-predicate-reference.html?lang=en#:~:text=or%20%22%20false%22-,contentfragment,-Restricts%20the%20result
Where I see:

But I am not sure how to use it?
I tried keeping it as is:
```
type=nt:unstructured
path=/content/dam/rallyhealth/ichabod/articles
p.hits=selective
nodename=master
p.properties=author featuredImage
contentfragment
```
I also tried:
```
type=nt:unstructured
path=/content/dam/rallyhealth/ichabod/articles
p.hits=selective
nodename=master
p.properties=author featuredImage
contentfragment=article
```
But all of this return no response. Can someone help me understand how can one use it?
