(motive : List Lean.Meta.RefinedDiscrTree.Key → Sort u_1) →
  (rhs : List Lean.Meta.RefinedDiscrTree.Key) →
    (Unit → motive []) →
      ((rhs : List Lean.Meta.RefinedDiscrTree.Key) → motive (Lean.Meta.RefinedDiscrTree.Key.star :: rhs)) →
        ((rHead : Lean.Meta.RefinedDiscrTree.Key) →
            (rhs : List Lean.Meta.RefinedDiscrTree.Key) → motive (rHead :: rhs)) →
          motive rhs