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: main.go
    path of file: ./repos/bubbletea/examples/stopwatch
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"os"
	"time"

	"github.com/charmbracelet/bubbles/help"
	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/stopwatch"
	tea "github.com/charmbracelet/bubbletea"
)

type model struct {
	stopwatch stopwatch.Model
	keymap    keymap
	help      help.Model
	quitting  bool
}

type keymap struct {
	start key.B
    
func main() {
	m := model{
		stopwatch: stopwatch.NewWithInterval(time.Millisecond),
		keymap: keymap{
			start: key.NewBinding(
				key.WithKeys("s"),
				key.WithHelp("s", "start"),
			),
			stop: key.NewBinding(
				key.WithKeys("s"),
				key.WithHelp("s", "stop"),
			),
			reset: key.NewBinding(
				key.WithKeys("r"),
				key.WithHelp("r", "reset"),
			),
			quit: key.NewBinding(
				key.WithKeys("ctrl+c", "q"),
				key.WithHelp("q", "quit"),
			),
		},
		help: help.New(),
	}

	m.keymap.start.SetEnabled(false)

	if _, err := tea.NewProgram(m).Run(); err != nil {
		fmt.Println("Oh no, it didn't work:", err)
		os.Exit(1)
	}
}