∀ {α : Type} {vs : Array α} {children : Array (Lean.Meta.DiscrTree.Key × Lean.Meta.DiscrTree.Trie α)} {vs_1 : Array α}
  {children_1 : Array (Lean.Meta.DiscrTree.Key × Lean.Meta.DiscrTree.Trie α)},
  Lean.Meta.DiscrTree.Trie.node vs children = Lean.Meta.DiscrTree.Trie.node vs_1 children_1 →
    vs = vs_1 ∧ children = children_1