Definition marshal j m args tm targs :=
  Build_SM_Injection
  (fun _ => false) (fun _ => false)
  (fun _ => false) (fun _ => false)
  (fun _ => None)
  (DomSrc j)
  (DomTgt j)
  (REACH m (getBlocks args))
  (REACH tm (getBlocks targs))
  (as_inj j).

Lemma DomTgt_marshal j m args tm targs : DomTgt (marshal j m args tm targs) = DomTgt j.