WordPress at a glance
action is not described

woocommerce_helper_loaded action-hook . WC 1.0

Usage

add_action( 'woocommerce_helper_loaded', 'action_function_name_853' );
function action_function_name_853(){
	// action...
}

Where the hook is called

WC_Helper::load()
woocommerce_helper_loaded
woocommerce/includes/admin/helper/class-wc-helper.php 49
do_action( 'woocommerce_helper_loaded' );

Where in WP core the hook is used WooCommerce

woocommerce/includes/admin/helper/class-wc-helper-compat.php 23
add_action( 'woocommerce_helper_loaded', array( __CLASS__, 'helper_loaded' ) );