∀ {α : Type u} [inst : BEq α] [inst_1 : Hashable α] {β : Type v} {m : Std.DHashMap.Raw α fun x => β} [LawfulBEq α]
  {p : α → β → Bool},
  m.WF → (m.all p = false ↔ ∃ a, ∃ (h : m.contains a = true), p a (Std.DHashMap.Raw.Const.get m a h) = false)