∀ {β : Type w} {m : Type w → Type w'} [inst : Monad m] [inst_1 : LawfulMonad m] (it : Std.BundledIterM m β),
  it.step = Std.Iterators.HetT.map (Std.IterStep.mapIterator Std.BundledIterM.ofIterM) it.iterator.stepAsHetT