ArcGIS Pro 2.8 API Reference Guide
TierGroup Class
Members 

ArcGIS.Core.Data.UtilityNetwork Namespace : TierGroup Class
Tier groups provide an extra level of organization for tiers. For example, a gas network may be divided into two tier groups - Transmission and Distribution. Each of these tier groups would contain a set of tiers specific to that group. For example, Distribution Pressure and Distribution Isolation might be tiers within the Distribution tier group.
Syntax
public sealed class TierGroup 
Public NotInheritable Class TierGroup 
Remarks
Tier groups are only applicable to hierarchical networks.
Inheritance Hierarchy

System.Object
   ArcGIS.Core.Data.UtilityNetwork.TierGroup

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

TierGroup Members
ArcGIS.Core.Data.UtilityNetwork Namespace