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: multiple_process.rs
    path of file: ./repos/freenet-core/crates/fdev/src/testing
    
    the code of the file until where you have to start completion: use std::{
    collections::{HashMap, VecDeque},
    fmt::Display,
    process::Stdio,
    time::Duration,
};

use anyhow::anyhow;
use freenet::dev_tool::{
    EventChain, InterProcessConnManager, MemoryEventsGen, NodeConfig, NodeLabel, PeerId, SimPeer,
};
use futures::{future::BoxFuture, stream::FuturesUnordered, FutureExt, StreamExt};
use rand::Rng;
use tokio::{
    io::{AsyncReadExt, AsyncWriteExt, BufReader, Stdin},
    process::{ChildStdout, Command},
};

use super::Error;

impl super::TestConfig {
    fn subprocess_command(&self, seed: u64) -> Vec<String> {
        let
    
    fn process_responses(&mut self, responses: ChildResponses) {
        for (target, data) in responses {
            if let Some(mut target) = self.processes.remove(&target) {
                tracing::debug!(to = %target.id, "Sending message");
                let task = async move {
                    target.send_msg(IPCMessage::Data(data)).await?;
                    Ok(target)
                }
                .boxed();
                self.sending.push(task);
            } else {
                tracing::debug!(%target, "Queuing message");
                self.queued
                    .entry(target)
                    .or_default()
                    .push_back(IPCMessage::Data(data));
            }
        }
    }