∀ {α : Type u} {β : α → Type v} [inst : BEq α] [inst_1 : Hashable α] (m₁ m₂ : Std.DHashMap.Internal.Raw₀ α β)
  [EquivBEq α] [LawfulHashable α],
  (↑m₁).WF → (↑m₂).WF → (↑m₁).Equiv ↑m₂ → ∀ {k fallback : α}, m₁.getKeyD k fallback = m₂.getKeyD k fallback