public static RemotingCommand createResponseCommand(Class<? extends CommandCustomHeader> classHeader) {
        return createResponseCommand(RemotingSysResponseCode.SYSTEM_ERROR, "not set any response code", classHeader);
    }
@Test
    public void testCreateResponseCommand_FailToCreateCommand() {
        System.setProperty(RemotingCommand.REMOTING_VERSION_KEY, "2333");

        int code = RemotingSysResponseCode.SUCCESS;
        String remark = "Sample remark";
        RemotingCommand cmd = RemotingCommand.createResponseCommand(code, remark, CommandCustomHeader.class);
        assertThat(cmd).isNull();
    }