t :: %Easypost.Batch{id: String.t, object: String.t, shipments: [Easypost.Shipment], status: map, label_url: String.t, num_shipments: number, created_at: String.t, updated_at: String.t}
add_to_batch(map, String.t, list) :: Easypost.Batch.t
batch_labels(map, String.t, map) :: Easypost.Batch.t
create_and_buy_batch(map, list) :: Easypost.Batch.t
create_batch(map, list) :: Easypost.Batch.t
remove_from_batch(map, String.t, list) :: Easypost.Batch.t