[Closed] Skin selection of vertices

fn getSkinVertSelection sk = 
(
   vsel = #{}
   vsel.count = skinOps.GetNumberVertices sk
   for k=1 to vsel.count where (skinOps.IsVertexSelected sk k) == 1 do append vsel k  
   vsel
) 
fn setSkinVertSelection sk vsel = 
(
   case vsel of
   (
         #all: vsel = #{1..skinOps.GetNumberVertices sk}
        #none: vsel = #{}
      #invert: vsel = -(getSkinVertSelection sk)
   )
   skinOps.SelectVertices sk vsel
   notifydependents sk partid:#select
   vsel
) 
-- examples
vsel = getSkinVertSelection $.skin
setSkinVertSelection $.skin #invert
setSkinVertSelection $.skin #none
setSkinVertSelection $.skin vsel

but as any SkinOps method it works just if Skin Modifier is a current Editing Object

Thank you so much for your help.