woocommerce_get_shipping_classes filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_get_shipping_classes', 'filter_function_name_7261' );
function filter_function_name_7261( $shipping_classes ){
	// filter...

	return $shipping_classes;
}

$shipping_classes

-

Where the hook is called

return apply_filters( 'woocommerce_get_shipping_classes', $this->shipping_classes );

Where in WP core the hook is used WooCommerce