∀ {α : Type u_1} {m : Type u_1 → Type u_2} {β : Type u_1} [inst : Std.Iterator α m β] [inst_1 : Monad m]
  [inst_2 : LawfulMonad m] (step : Std.IterStep (Std.IterM m β) β),
  step.bundledQuotient = Std.IterStep.mapIterator (Quot.mk (Std.BundledIterM.Equiv m β) ∘ Std.BundledIterM.ofIterM) step