∀ {α : Type u} [inst : BEq α] [inst_1 : Hashable α] [EquivBEq α] [LawfulHashable α]
  {m₁ m₂ : Std.DHashMap.Internal.Raw₀ α fun x => Unit},
  (↑m₁).WF → (↑m₂).WF → (∀ (k : α), m₁.getKey? k = m₂.getKey? k) → (↑m₁).Equiv ↑m₂