∀ {α : Type u} {β : α → Type v} (cmp : autoParam (α → α → Ordering) Std.DTreeMap.toList_rci._auto_1) [Std.TransCmp cmp]
  {t : Std.DTreeMap α β cmp} {bound : α},
  Std.Slice.toList (Std.Rci.Sliceable.mkSlice t bound...*) = List.filter (fun e => (cmp e.fst bound).isGE) t.toList