woocommerce_admin_html_order_item_class filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_admin_html_order_item_class', 'filter_function_name_2757', 10, 3 );
function filter_function_name_2757( $class, $item, $order ){
	// filter...

	return $class;
}

$class

-

$item

-

$order

-

Where the hook is called

$row_class    = apply_filters( 'woocommerce_admin_html_order_item_class', ! empty( $class ) ? $class : '', $item, $order );

Where in WP core the hook is used WooCommerce