ArcGIS Pro 2.5: How to set “sink” and “source” values for a reservoir?

[JamalNUMAN]

ArcGIS Pro 2.5: How to set “sink” and “source” values for a reservoir?

For example, in ArcMap, the “sink” and “source” values can be set for a particular reservoir from the “AncillaryRole” field that is linked to “AncillaryRoleDomain”.

How is this performed in Pro?