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: mod.rs
    path of file: ./repos/visual-assembly-canvas/machine/src/sequencer
    
    the code of the file until where you have to start completion: pub mod status;
pub mod seq_error;

use std::collections::HashMap;
use serde::{Deserialize, Serialize};
use crate::{Actor, Event, Execute, Machine, Message,
    
    pub fn step(&mut self, count: u16) -> Errorable {
        for machine in &mut self.machines {
            let Some(id) = machine.id else { continue; };
            let statuses = self.statuses.clone();

            let Some(status) = statuses.get(&id) else { continue; };
            let status = status.clone();

            // Manage state transitions of the machine.
            match status {
                Halted | Invalid | Loaded | Errored => continue,
                Ready => { self.statuses.insert(id, Running); }
                _ => {}
            }

            // Before each instruction cycle, we collect and process the messages sequentially.
            machine.receive_messages().map_err(|error| ReceiveFailed { error: error.into() })?;

            // If a message is received, we resume the machine's execution.
            // Otherwise, we suspend the machine's execution until subsequent cycles.
            if status == Awaiting {
                // Do not tick the machine if the still did not receive the message.
                if machine.expected_receives > 0 {
                    // Watchdog prevents the `receive` instruction from blocking forever.
                    if self.await_watchdog {
                        // Raise an error if all peers are halted.
                        if self.await_watchdog_counter == 0 {
                            self.statuses.insert(id, Errored);
                            return Err(MessageNeverReceived { id });
                        }

                        // Decrement the watchdog counter
                        if peers_halted(statuses.clone(), id) {
                            self.await_watchdog_counter -= 1;
                        }
                    }

                    continue;
                }

                // If it's the last instruction, we halt the machine as the message is received.
                if machine.should_halt() {
                    self.statuses.insert(id, Halted);
                    continue;
                }

                self.statuses.insert(id, Running);
            }

            for _ in 0..count {
                // Execute the instruction.
                machine.tick().map_err(|error| {
                    self.statuses.insert(id, Errored);
                    ExecutionFailed { id, error: error.into() }
                })?;

                // If the last instruction is a `receive`,
                // we suspend the machine's execution until subsequent cycles,
                // until the machine receives a message.
                if machine.expected_receives > 0 {
                    self.statuses.insert(id, Awaiting);
                    break;
                }

                // Halt the machine if we reached the end of the program.
                if machine.should_halt() {
                    self.statuses.insert(id, Halted);
                    break;
                }
            }
        }

        Ok(())
    }