public function pause($remaining_pause_cycles) {
    $doc = $this->createDocument();
    $root = $doc->appendChild($doc->createElement($this->getNodeName()));
    $root->appendChild($doc->createElement('remaining_pause_cycles', $remaining_pause_cycles));
    $this->_save(Recurly_Client::PUT, $this->uri() . '/pause', $this->renderXML($doc));
  }