∀ {α : Type u} [inst : BEq α] [inst_1 : Hashable α] {β : Type v} [EquivBEq α] [LawfulHashable α] {l : List (α × β)}
  {k : α},
  (List.map Prod.fst l).contains k = false →
    Std.DHashMap.Internal.Raw₀.Const.get?
        (↑(Std.DHashMap.Internal.Raw₀.Const.insertMany Std.DHashMap.Internal.Raw₀.emptyWithCapacity l)) k =
      none