public function updateEntryFromInvoice(CashBookEntry $entry, Invoice $invoice, $amount)
 {
     $this->client->connect();
     try {
         $this->client->CashBookEntry_SetAmount(array('cashBookEntryHandle' => $entry->getHandle(), 'value' => $amount));
         $number = $invoice->getHandle();
         if (is_array($number)) {
             $number = current($number);
         }
         $this->client->CashBookEntry_SetDebtorInvoiceNumber(array('cashBookEntryHandle' => $entry->getHandle(), 'value' => $number));
         $this->client->CashBookEntry_SetText(array('cashBookEntryHandle' => $entry->getHandle(), 'value' => "Invoice: {$number}, Other Reference: {$invoice->getOtherReference()}"));
         return $entry;
     } catch (\SoapFault $e) {
         throw new EconomicException($e->getMessage());
     }
 }