∀ {α : Type u} [inst : BEq α] [inst_1 : Hashable α] {β : Type v} (m : Std.DHashMap.Internal.Raw₀ α fun x => β)
  [EquivBEq α] [LawfulHashable α] [inst_4 : Inhabited β],
  (↑m).WF →
    ∀ {k a : α},
      Std.DHashMap.Internal.Raw₀.Const.get! (m.erase k) a =
        if (k == a) = true then default else Std.DHashMap.Internal.Raw₀.Const.get! m a