class DeleteCallbackAction extends RobotAction {

    @Override
    public boolean action(Request request, Response response) {<FILL_FUNCTION_BODY>}
}

        if (request.getNettyRequest() instanceof FullHttpRequest) {
            if(!StringUtil.isNullOrEmpty(robot.getCallback())) {
                robot = robot.toBuilder().clearCallback().setState(0).build();
                messagesStore.addRobot(robot);
            }
            setResponseContent(RestResult.ok(), response);
        }
        return true;
    
<methods>public non-sealed void <init>() ,public cn.wildfirechat.common.ErrorCode preAction(com.xiaoleilu.loServer.handler.Request, com.xiaoleilu.loServer.handler.Response) <variables>protected static final Logger LOG,protected cn.wildfirechat.proto.WFCMessage.Robot robot