Definition tryrecv_action_wrapper :=
  Action tryrecv_act_safe_coh tryrecv_act_step_total tryrecv_act_step_sem.

(* Specifications: *)
Lemma send_act_safe_coh s : send_act_safe s -> Coh W s.
Lemma safe_safe s : send_act_safe s -> send_safe st this to (getS s l) msg.
Lemma send_act_step_total s (S: send_act_safe s): exists s' r , send_act_step S s' r.
Lemma send_act_step_sem s1 (S : send_act_safe s1) s2 r: send_act_step S s2 r -> network_step W this s1 s2.