∀ {α α₂ β : Type w} {m : Type w → Type u_1} {it₁ : Std.IterM m (Std.IterM m β)} {it₂ : Option (Std.IterM m β)}
  {it₁_1 : Std.IterM m (Std.IterM m β)} {it₂_1 : Option (Std.IterM m β)},
  { it₁ := it₁, it₂ := it₂ } = { it₁ := it₁_1, it₂ := it₂_1 } → it₁ = it₁_1 ∧ it₂ = it₂_1