in a old post found the following command: but what's the existing one please
$swis = Connect-Swis -UserName admin -Password ''
New-SwisObject $swis Orion.Dependencies @{Name="test1";ParentUri='swis://tdanner-dev.swdev.local/Orion/Orion.Nodes/NodeID=1';ChildUri='swis://tdanner-dev.swdev.local/Orion/Orion.Nodes/NodeID=2'}