You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dummy.rs
    path of file: ./repos/ckb/miner/src/worker
    
    the code of the file until where you have to start completion: use super::{Worker, WorkerMessage};
use crate::Work;
use ckb_app_config::DummyConfig;
use ckb_channel::{Receiver, Sender};
use ckb_logger::error;
use ckb_types::packed::Byte32;
use indicatif::ProgressBar;
use rand::thread_rng;
use rand_distr::{self as dist, Distri
    
    fn poll_worker_message(&mut self) {
        while let Ok(msg) = self.worker_rx.try_recv() {
            match msg {
                WorkerMessage::NewWork { pow_hash, work, .. } => {
                    self.pow_work = Some((pow_hash, work))
                }
                WorkerMessage::Stop => {
                    self.start = false;
                }
                WorkerMessage::Start => {
                    self.start = true;
                }
            }
        }
    }