private RemotingCommand getUnknownCmdResponse(ChannelHandlerContext ctx, RemotingCommand request) {
        String error = " request type " + request.getCode() + " not supported";
        final RemotingCommand response =
            RemotingCommand.createResponseCommand(RemotingSysResponseCode.REQUEST_CODE_NOT_SUPPORTED, error);
        return response;
    }
@Test
    public void testGetUnknownCmdResponse() throws RemotingCommandException {
        RemotingCommand request = RemotingCommand.createRequestCommand(10000, null);
        RemotingCommand response = adminBrokerProcessor.processRequest(handlerContext, request);
        assertThat(response.getCode()).isEqualTo(ResponseCode.REQUEST_CODE_NOT_SUPPORTED);
    }