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: mycaller.go
    path of file: ./repos/tegola/container/singlelist
    
    the code of the file until where you have to start completion: package list

import (
	"fmt"
	"path/filepath"
	"runtime"
)

// MyCallerFileLine returns the FileLine of the caller of the function that called it :)
func MyCallerFileLine() string {

	// we get the callers as uintptrs - but we just need 1
	fpcs := make([]uintptr, 1)

	// skip 3 levels to get to the caller of whoever called Caller()
	n := runti
    
func MyCallerFileLine() string {

	// we get the callers as uintptrs - but we just need 1
	fpcs := make([]uintptr, 1)

	// skip 3 levels to get to the caller of whoever called Caller()
	n := runtime.Callers(3, fpcs)
	if n == 0 {
		return "n/a" // proper error her would be better
	}

	// get the info of the actual function that's in the pointer
	fun := runtime.FuncForPC(fpcs[0] - 1)
	if fun == nil {
		return "n/a"
	}

	// return its name
	filename, line := fun.FileLine(fpcs[0] - 1)
	filename = filepath.Base(filename)
	return fmt.Sprintf("%v:%v", filename, line)
}