code: protected Response callServiceImpl(String urlSymbolKey, String soapAction) {
          String url = getSymbol(urlSymbolKey).toString();
          Response response = getEnvironment().createInstance(getResponseClass());
          callSoapService(url, getTemplateName(), soapAction, response);
          return response;
      }
docs: Creates response, calls service using configured template and current row's values and calls SOAP service.
  @param urlSymbolKey key of symbol containing service's URL.
  @param soapAction SOAPAction header value (null if no header is required).
  @return filled response