∀ {α : Type u} [inst : BEq α] [inst_1 : Hashable α] {β : Type v} (m : Std.DHashMap.Internal.Raw₀ α fun x => β)
  [inst_2 : LawfulBEq α], (↑m).WF → ∀ {a : α}, Std.DHashMap.Internal.Raw₀.Const.get? m a = m.get? a