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: engine.rs
    path of file: ./repos/arroyo/arroyo-worker/src
    
    the code of the file until where you have to start completion: use std::fmt::{Debug, Formatter};
use std::marker::PhantomData;

use std::any::Any;
use std::collections::{BTreeMap, HashMap};
use std::{mem, thread};

use std::sync::Arc;
use std::time::SystemTime;

use arroyo_state::tables::time_key_map::TimeKeyMap;
use bincode::{config, Decode, Encode};

use tracing::{debug, info, warn};

pub use arroyo_macro::StreamNode;
use arroyo_rpc::formats::BadData;
use arroyo_rpc::grpc::{
    CheckpointMetadata, TableDeleteBehavior, TableDe
    
    pub fn new_for_test() -> (Self, Receiver<QueueItem>) {
        let (_, control_rx) = channel(128);
        let (command_tx, _) = channel(128);
        let (data_tx, data_rx) = channel(128);

        let out_queue = OutQueue::new(data_tx, false);

        let task_info = TaskInfo {
            job_id: "instance-1".to_string(),
            operator_name: "test-operator".to_string(),
            operator_id: "test-operator-1".to_string(),
            task_index: 0,
            parallelism: 1,
            key_range: 0..=0,
        };

        let ctx = futures::executor::block_on(Context::new(
            task_info,
            None,
            control_rx,
            command_tx,
            1,
            vec![vec![out_queue]],
            vec![],
        ));

        (ctx, data_rx)
    }