code: public boolean pushResponsePayload(ResponsePayload responsePayload) {
          if (payloads.containsKey(responsePayload.getSerialId())) {
              payloads.put(responsePayload.getSerialId(), responsePayload);
              return true;
          }
          return false;
      }
docs: /*
  (non-Javadoc)
  @see org.jboss.arquillian.warp.impl.client.execution.WarpGroup#pushResponsePayload(org.jboss.arquillian.warp.impl.shared.ResponsePayload)