protected function get_paypal_args( $order ) {
		WC_Gateway_Paypal::log( 'Generating payment form for order ' . $order->get_order_number() . '. Notify URL: ' . $this->notify_url );

		$force_one_line_item = apply_filters( 'woocommerce_paypal_force_one_line_item', false, $order );

		if ( ( wc_tax_enabled() && wc_prices_include_tax() ) || ! $this->line_items_valid( $order ) ) {
			$force_one_line_item = true;
		}

		$paypal_args = apply_filters(
			'woocommerce_paypal_args',
			array_merge(
				$this->get_transaction_args( $order ),
				$this->get_line_item_args( $order, $force_one_line_item )
			),
			$order
		);

		return $this->fix_request_length( $order, $paypal_args );
	}