{P : Sort u} →
  {i : Lean.Elab.Info} →
    {children : Lean.PersistentArray Lean.Elab.InfoTree} →
      {i' : Lean.Elab.Info} →
        {children' : Lean.PersistentArray Lean.Elab.InfoTree} →
          Lean.Elab.InfoTree.node i children = Lean.Elab.InfoTree.node i' children' →
            (i = i' → children = children' → P) → P