Set the identification for the instance group to modify. You can specify either
core or task if there is only one instance group of that role. Otherwise you can
specify the instance group ID (such as ig-ABABABABABAB).

C# |
[ObsoleteAttribute("The With methods are obsolete and will be removed in version 2 of the AWS SDK for .NET. See http://aws.amazon.com/sdkfornet/#version2 for more information.")] public ModifyInstanceGroup WithInstanceGroup( string instanceGroup )

- instanceGroup (String)
- Identifier for the instance group.

A reference to this updated object so that method calls can be chained
together.