∀ {α : Type u_1} {β : α → Type u_2} [Hashable α] (self : Array (Std.DHashMap.Internal.AssocList α β)) (i : USize),
  i.toNat < self.size →
    ∀ (l₁ l₂ : List (Std.DHashMap.Internal.AssocList α β)) (k : α), ∀ j < l₂.length, ¬j + 1 < l₂.length + 1 → False