return state_transfer_successfull.booleanValue();
return state_transfer_successfull != null && state_transfer_successfull.booleanValue();
    private boolean _getState(Event evt, StateTransferInfo info) throws ChannelNotConnectedException, ChannelClosedException {        checkClosed();        checkNotConnected();        if(!state_transfer_supported) {            log.error("fetching state will fail as state transfer is not supported. "                      + "Add one of the STATE_TRANSFER protocols to your protocol configuration");            return false;        }        state_promise.reset();        down(evt);        Boolean state_transfer_successfull=(Boolean)state_promise.getResult(info.timeout);        return state_transfer_successfull.booleanValue();    }