public function downloadDatabaseBackup($site, $env, $db, $backupId, $outfile)
{
$variables = array('site' => $site, 'env' => $env, 'db' => $db, 'id' => $backupId);
return $this->get(array('{+base_path}/sites/{site}/envs/{env}/dbs/{db}/backups/{id}/download.json', $variables))->setResponseBody($outfile)->send();
}