∀ {α : Type u} {β : α → Type v} [inst : Ord α] [Std.TransOrd α] (t : Std.DTreeMap.Internal.Impl α β),
  t.Ordered →
    ∀ (lowerBound upperBound : α),
      Std.Slice.toList (Std.Rcc.Sliceable.mkSlice t lowerBound...=upperBound) =
        List.filter (fun e => decide ((compare e.fst lowerBound).isGE = true ∧ (compare e.fst upperBound).isLE = true))
          t.toList