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: utils.go
    path of file: ./repos/moby/vendor/github.com/Graylog2/go-gelf/gelf
    
    the code of the file until where you have to start completion: package gelf

import (
	"runtime"
	"strings"
)

// getCaller returns the filename an
    
func getCaller(callDepth int, suffixesToIgnore ...string) (file string, line int) {
	// bump by 1 to ignore the getCaller (this) stackframe
	callDepth++
outer:
	for {
		var ok bool
		_, file, line, ok = runtime.Caller(callDepth)
		if !ok {
			file = "???"
			line = 0
			break
		}

		for _, s := range suffixesToIgnore {
			if strings.HasSuffix(file, s) {
				callDepth++
				continue outer
			}
		}
		break
	}
	return
}