/** {@inheritDoc} */
 @Override
 public void listenFutureForOperation(final long futId, int typ, int opId) throws Exception {
   PlatformFutureUtils.listen(
       platformCtx, currentFuture(), futId, typ, futureWriter(opId), target);
 }
 /** {@inheritDoc} */
 @Override
 public void listenFuture(final long futId, int typ) throws Exception {
   PlatformFutureUtils.listen(platformCtx, currentFuture(), futId, typ, null, target);
 }