public function update_product( $item, $product, $args ) {
		wc_deprecated_function( 'WC_Order::update_product', '3.0', 'an interaction with the WC_Order_Item_Product class' );
		if ( is_numeric( $item ) ) {
			$item = $this->get_item( $item );
		}
		if ( ! is_object( $item ) || ! $item->is_type( 'line_item' ) ) {
			return false;
		}
		if ( ! $this->get_id() ) {
			$this->save(); // Order must exist
		}

		// BW compatibility with old args
		if ( isset( $args['totals'] ) ) {
			foreach ( $args['totals'] as $key => $value ) {
				if ( 'tax' === $key ) {
					$args['total_tax'] = $value;
				} elseif ( 'tax_data' === $key ) {
					$args['taxes'] = $value;
				} else {
					$args[ $key ] = $value;
				}
			}
		}

		// Handle qty if set.
		if ( isset( $args['qty'] ) ) {
			if ( $product->backorders_require_notification() && $product->is_on_backorder( $args['qty'] ) ) {
				$item->add_meta_data( apply_filters( 'woocommerce_backordered_item_meta_name', __( 'Backordered', 'woocommerce' ), $item ), $args['qty'] - max( 0, $product->get_stock_quantity() ), true );
			}
			$args['subtotal'] = $args['subtotal'] ? $args['subtotal'] : wc_get_price_excluding_tax( $product, array( 'qty' => $args['qty'] ) );
			$args['total']	= $args['total'] ? $args['total'] : wc_get_price_excluding_tax( $product, array( 'qty' => $args['qty'] ) );
		}

		$item->set_order_id( $this->get_id() );
		$item->set_props( $args );
		$item->save();
		do_action( 'woocommerce_order_edit_product', $this->get_id(), $item->get_id(), $args, $product );

		return $item->get_id();
	}