∀ {α : Type u} {β : Type v} {m : Std.DHashMap.Internal.Raw₀ α fun x => β} [inst : BEq α] [EquivBEq α]
  [inst_2 : Hashable α] [LawfulHashable α],
  Std.DHashMap.Internal.Raw.WFImp ↑m →
    ∀ {a : α} {f : β → β},
      (Std.DHashMap.Internal.toListModel (↑(Std.DHashMap.Internal.Raw₀.Const.modify m a f)).buckets).Perm
        (Std.Internal.List.Const.modifyKey a f (Std.DHashMap.Internal.toListModel (↑m).buckets))