woocommerce_is_downloadable filter-hook . WC 1.0

Checks if a product is downloadable.

Usage

add_filter( 'woocommerce_is_downloadable', 'filter_function_name_3842', 10, 2 );
function filter_function_name_3842( $true === $this->get_downloadable, $that ){
	// filter...

	return $true === $this->get_downloadable;
}

$true === $this->get_downloadable

-

$that

-

Where the hook is called

return apply_filters( 'woocommerce_is_downloadable', true === $this->get_downloadable(), $this );

Where in WP core the hook is used WooCommerce