∀ {α : Type u} {β : Type v} (cmp : autoParam (α → α → Ordering) Std.TreeMap.Raw.toList_rco._auto_1) [Std.TransCmp cmp]
  {t : Std.TreeMap.Raw α β cmp},
  t.WF →
    ∀ {lowerBound upperBound : α},
      Std.Slice.toList (Std.Rco.Sliceable.mkSlice t lowerBound...upperBound) =
        List.filter (fun e => decide ((cmp e.1 lowerBound).isGE = true ∧ (cmp e.1 upperBound).isLT = true)) t.toList