public function updateCurrencyObject()
 {
     if (!$_POST['currency_id']) {
         return false;
     }
     $obj_currency = new ilPaymentCurrency($_POST['currency_id']);
     $obj_currency->setUnit($_POST['currency_unit']);
     $obj_currency->setIsoCode($_POST['iso_code']);
     $obj_currency->setSymbol($_POST['symbol']);
     $obj_currency->setConversionRate($_POST['conversion_rate']);
     $obj_currency->updateCurrency();
     $this->currenciesObject();
     return true;
 }