public function addEntriesToBlacklist($id, $entries, $importName = null)
    {
        if ($importName == null) {
            $importName = "phpclient_import_" . uniqid();
        }
        $action = new AddEntriesAction();
        $action->importName = $importName;
        $action->entries = $entries;
        return $this->post("blacklists/" . $id . "/actions", $action->toXMLString());
    }