∀ {α : Type u_1} {β : α → Type u_2} (motive : { d // 0 < d.size } → Sort u_3)
  (data : Array (Std.DHashMap.Internal.AssocList α β)) (hd : 0 < data.size)
  (h_1 : (data : Array (Std.DHashMap.Internal.AssocList α β)) → (hd : 0 < data.size) → motive ⟨data, hd⟩),
  (match ⟨data, hd⟩ with
    | ⟨data, hd⟩ => h_1 data hd) =
    h_1 data hd