woocommerce_cart_totals_before_order_total action-hook . WC 1.0

Usage

add_action( 'woocommerce_cart_totals_before_order_total', 'action_function_name_3565' );
function action_function_name_3565(){
	// action...
}

Where the hook is called

<?php do_action( 'woocommerce_cart_totals_before_order_total' ); ?>

Where in WP core the hook is used WooCommerce