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