∀ {α : Type u} {β : α → Type v} {cmp : autoParam (α → α → Ordering) Std.DTreeMap._auto_1}
  {inner : Std.DTreeMap.Internal.Impl α β} {wf : inner.WF} {inner_1 : Std.DTreeMap.Internal.Impl α β}
  {wf_1 : inner_1.WF}, { inner := inner, wf := wf } = { inner := inner_1, wf := wf_1 } → inner = inner_1