How to pass group type filter condition

can any one help how to pass filter=type+eq+“OKTA_GROUP” (api) condition same SDK GroupsClient request.
am using c# OKTA.core.client SDK, How to pass filter condition (OKTA_GROUP) to request

below lines are SDK code base:
string filter=null;
groups = oktaClient.GetGroupsClient().GetList(nextPage, pageSize, filter);

API Ref :

Thanks in Adavance.

Looks like you have another post open with the same question, so I’m going to close this one out. You can find my response in that thread.