{α : Type} →
  {motive_1 : Lean.Meta.DiscrTree.Trie α → Sort u} →
    (t : Lean.Meta.DiscrTree.Trie α) →
      ((vs : Array α) →
          (children : Array (Lean.Meta.DiscrTree.Key × Lean.Meta.DiscrTree.Trie α)) →
            motive_1 (Lean.Meta.DiscrTree.Trie.node vs children)) →
        motive_1 t