How to delete a node's active connections in Powershell

I'm playing around with (Get-F5.iControl).SystemConnections.delete_all_active_connections and .delete_active_connection without much success. I want to be able to delete a node's active connections after forcing the node offline. Essentially, I want the Powershell equivalent of

 

tmsh delete /sys connection ss-server-addr 10.10.10.211

 

as explained on this page: https://support.f5.com/kb/en-us/solutions/public/13000/300/sol13310.html

 

Can anyone help? Thanks much.