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: find_missing_lua_interfaces.go
    path of file: ./repos/toggldesktop/src/script
    
    the code of the file until where you have to start completion: package main

import (
	"io/ioutil"
	"os"
	"strings"
)

func main() {
	var apiFuncs, luaFuncs, testFuncs []string
	var err error
	if err == nil {
		apiFun
    
func findMissingInterfaces(expected []string, actual []string) []string {
	var missing []string
	for _, expectedFunc := range expected {
		found := false
		for _, actualFunc := range actual {
			if expectedFunc == actualFunc {
				found = true
				break
			}
		}
		if !found {
			missing = append(missing, expectedFunc)
		}
	}
	return missing
}