woocommerce_restore_order_stock action-hook . WC 1.0

Usage

add_action( 'woocommerce_restore_order_stock', 'action_function_name_12' );
function action_function_name_12( $order ){
	// action...
}

$order

-

Where the hook is called

do_action( 'woocommerce_restore_order_stock', $order );

Where in WP core the hook is used WooCommerce