Add a new action for this step to perform. These actions can be to modify
or add instance groups. This step supports multiple actions, but requires
at least one be specified.

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 ResizeJobFlowStep WithResizeAction( ResizeAction resizeAction )

- resizeAction (ResizeAction)
- An instance of ResizeAction defining the change.

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