WordPress at a glance
filter is not described

woocommerce_admin_order_item_coupon_url filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_admin_order_item_coupon_url', 'filter_function_name_9636', 10, 3 );
function filter_function_name_9636( $add_query_arg, $item, $order ){
	// filter...

	return $add_query_arg;
}
$add_query_arg
-
$item
-
$order
-

Where the hook is called

In file: /includes/admin/meta-boxes/views/html-order-items.php
woocommerce_admin_order_item_coupon_url
woocommerce/includes/admin/meta-boxes/views/html-order-items.php 116-127
$post_url = apply_filters(
	'woocommerce_admin_order_item_coupon_url',
	add_query_arg(
		array(
			'post'   => $post_id,
			'action' => 'edit',
		),
		admin_url( 'post.php' )
	),
	$item,
	$order
);

Where in WP core the hook is used WooCommerce

Usage not found.