{motive : Lean.PrettyPrinter.Delaborator.AppImplicitArg → Sort u} →
  (t : Lean.PrettyPrinter.Delaborator.AppImplicitArg) →
    t.ctorIdx = 1 → ((s : Lean.Term) → motive (Lean.PrettyPrinter.Delaborator.AppImplicitArg.regular s)) → motive t