WordPress at a glance
action is not described

woocommerce_order_item_add_action_buttons action-hook . WC 1.0

Allow adding custom buttons.

Usage

add_action( 'woocommerce_order_item_add_action_buttons', 'action_function_name_2018' );
function action_function_name_2018( $order ){
	// action...
}
$order
-

Where the hook is called

In file: /includes/admin/meta-boxes/views/html-order-items.php
woocommerce_order_item_add_action_buttons
woocommerce/includes/admin/meta-boxes/views/html-order-items.php 287
do_action( 'woocommerce_order_item_add_action_buttons', $order );

Where in WP core the hook is used WooCommerce

Usage not found.