∀ {K : Type u_1} {Γ : K → Type u_2} {Λ : Type u_3} {σ : Type u_4} (k : K) (f : σ → Option (Γ k) → σ)
  (q : Turing.TM2.Stmt Γ Λ σ),
  Turing.TM2to1.trStmts₁ (Turing.TM2.Stmt.pop k f q) =
    {Turing.TM2to1.Λ'.go k (Turing.TM2to1.StAct.pop f) q, Turing.TM2to1.Λ'.ret q} ∪ Turing.TM2to1.trStmts₁ q