(motive : Lean.Elab.InfoTree → Sort u_1) →
  (node : Lean.Elab.InfoTree) →
    ((i : Lean.Elab.Info) → (ts : Lean.PersistentArray Lean.Elab.InfoTree) → motive (Lean.Elab.InfoTree.node i ts)) →
      ((x : Lean.Elab.InfoTree) → motive x) → motive node