public function copyDatabase($site, $db, $sourceEnv, $targetEnv)
{
$variables = array('site' => $site, 'db' => $db, 'source' => $sourceEnv, 'target' => $targetEnv);
$request = $this->post(array('{+base_path}/sites/{site}/dbs/{db}/db-copy/{source}/{target}.json', $variables));
return new Response\Task($request);
}