code: public void receiveResponse(Object response_value, Address sender, boolean is_exception) {
          if(isDone())
              return;
          if(is_exception && response_value instanceof Throwable)
              completeExceptionally((Throwable)response_value);
          else
              complete((T)response_value);
          corrDone();
      }
docs: <b>Callback</b> (called by RequestCorrelator or Transport).
  Adds a response to the response table. When all responses have been received, {@code execute()} returns.