woocommerce_admin_order_preview_actions filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_admin_order_preview_actions', 'filter_function_name_3335', 10, 2 );
function filter_function_name_3335( $actions, $order ){
	// filter...

	return $actions;
}

$actions

-

$order

-

Where the hook is called

return wc_render_action_buttons( apply_filters( 'woocommerce_admin_order_preview_actions', $actions, $order ) );

Where in WP core the hook is used WooCommerce