{α : Type w} →
  {m : Type w → Type w'} →
    {β : Type w} →
      {motive : Std.Iterators.Types.Drop α m β → Sort u} →
        ((remaining : ℕ) → (inner : Std.IterM m β) → motive { remaining := remaining, inner := inner }) →
          (t : Std.Iterators.Types.Drop α m β) → motive t