Could someone please tell me if there is a simple way (e.g. boolean property to set) to get the Infragistics WPF XamDataGrid to show the row number?

I found something in the feature browser, but that seems to be for the XamGrid. We use the WPFv3 11.2 libraries.

Some quick Googling seems to indicate that the feature isn't supported, but the latest post seems to be in 2011.