How to display DP relationships using REST API

When looking at the description of netapp_ontap.resources.snapmirror_relationship class it looks like only XDP relations are supported:

"This API manages asynchronous extended data protection (XDP) relationships for FlexVols, FlexGroups, or SVMs."

ref: https://library.netapp.com/ecmdocs/ECMLP2858435/html/resources/snapmirror_relationship.html

I have also confirmed that when querying  filers with a mixture of DP and XDP relations, only XDP's are returned in the json object.

like: GET "/api/snapmirror/relationships/" 

Is there any way to make API to include DP relations, at least for reporting purposes ?

Thanks