Definition NDmk_funspec (f: funsig) (cc: calling_convention)
  (A: Type) (Pre Post: A -> environ -> mpred): funspec :=
  mk_funspec f cc (rmaps.ConstType A) (fun _ => Pre) (fun _ => Post)
    (const_super_non_expansive _ _) (const_super_non_expansive _ _).

Lemma corable_allp_fun_id: forall Delta rho, corable (allp_fun_id Delta rho).