ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Framework Namespace / NotificationItem Class / Group Property

Group Property (NotificationItem)
Gets a string value if the item shows in the Application or Project category.
Syntax
public string Group {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.1 or higher.
See Also