public function updateSubnet($subnetId, $options)
{
$result = null;
$response = $this->getClient()->call($this->service, sprintf('/subnets/%s', $this->escape($subnetId)), array('_putData' => json_encode(array('subnet' => $options))), 'PUT');
if ($response->hasError() === false) {
$result = json_decode($response->getContent());
$result = $result->subnet;
}
return $result;
}