multisite with parked domains (server aliases)

I mean like this:

/**
	 * Returns the URL to the directory where the plugin file is located
	 * @since 3.0b5
	 * @return string The URL to the plugin directory
	 */

	public function GetPluginUrl() {

		$url = wp_make_link_relative( trailingslashit(plugins_url("", __FILE__)) );

		return $url;
	}