Search notes:

System.Management.Automation.ConfirmImpact (enum)

System.Management.Automation.ConfirmImpact is the type of the PowerShell preference variable $confirmImpact and the property ConfirmImpact of the System.Management.Automation.CommandMetadata class.

The ConfirmImpact enum has four values. In PowerShell, these values can be shown like so:

PS C:\> [System.Enum]::GetValues('System.Management.Automation.ConfirmImpact')
None
Low
Medium
High