woocommerce_get_availability_text filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_get_availability_text', 'filter_function_name_5657', 10, 2 );
function filter_function_name_5657( $availability, $that ){
	// filter...

	return $availability;
}

$availability

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_get_availability_text', $availability, $this );

Where in WP core the hook is used WooCommerce