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/mattermost/server/public/plugin/checker
    
    the code of the file until where you have to start completion: // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package main

import (
	"fmt"
	"os"
	"sort"
	"strings"
)

const pluginPackagePath = "github.com/mattermost/mattermost/server/public/plugin"

type result struct {
	Warnings []string
	Errors   []string
}

type checkFn func(p
    
func main() {
	var res result
	for _, check := range checks {
		res = runCheck(res, check)
	}

	var msgs []string
	msgs = append(msgs, res.Errors...)
	msgs = append(msgs, res.Warnings...)
	sort.Strings(msgs)

	if len(msgs) > 0 {
		fmt.Fprintln(os.Stderr, "#", pluginPackagePath)
		fmt.Fprintln(os.Stderr, strings.Join(msgs, "\n"))
	}

	if len(res.Errors) > 0 {
		os.Exit(1)
	}
}