WordPress at a glance
action is not described

woocommerce_update_order_item action-hook . WC 1.0

Usage

add_action( 'woocommerce_update_order_item', 'action_function_name_395', 10, 2 );
function action_function_name_395( $item_id, $args ){
	// action...
}
$item_id
-
$args
-

Where the hook is called

wc_update_order_item()
woocommerce_update_order_item
Abstract_WC_Order_Item_Type_Data_Store::update()
woocommerce_update_order_item
woocommerce/includes/wc-order-item-functions.php 62
do_action( 'woocommerce_update_order_item', $item_id, $args );
woocommerce/includes/data-stores/abstract-wc-order-item-type-data-store.php 91
do_action( 'woocommerce_update_order_item', $item->get_id(), $item, $item->get_order_id() );

Where in WP core the hook is used WooCommerce

Usage not found.