Pimcore\Tool\Session::useSession PHP Method

    public static function useSession($func, $namespace = "pimcore_admin")
    {
        $ret = $func(self::get($namespace));
        self::writeClose();
        return $ret;
    }

 public function updateCurrentUserAction()
 {
     $this->protectCSRF();
     $user = $this->getUser();
     if ($user != null) {
         if ($user->getId() == $this->getParam("id")) {
             $values = \Zend_Json::decode($this->getParam("data"));
             unset($values["name"]);
             unset($values["id"]);
             unset($values["admin"]);
             unset($values["permissions"]);
             unset($values["roles"]);
             unset($values["active"]);
             if (!empty($values["new_password"])) {
                 $oldPasswordCheck = false;
                 if (empty($values["old_password"])) {
                     // if the user want to reset the password, the old password isn't required
                     $oldPasswordCheck = Tool\Session::useSession(function ($adminSession) use($oldPasswordCheck) {
                         if ($adminSession->password_reset) {
                             return true;
                         }
                         return false;
                     });
                 } else {
                     // the password has to match
                     $checkUser = Tool\Authentication::authenticatePlaintext($user->getName(), $values["old_password"]);
                     if ($checkUser) {
                         $oldPasswordCheck = true;
                     }
                 }
                 if ($oldPasswordCheck && $values["new_password"] == $values["retype_password"]) {
                     $values["password"] = Tool\Authentication::getPasswordHash($user->getName(), $values["new_password"]);
                 } else {
                     $this->_helper->json(["success" => false, "message" => "password_cannot_be_changed"]);
                 }
             }
             $user->setValues($values);
             $user->save();
             $this->_helper->json(["success" => true]);
         } else {
             \Logger::warn("prevented save current user, because ids do not match. ");
             $this->_helper->json(false);
         }
     } else {
         $this->_helper->json(false);
     }
 }