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: reader_appengine.go
    path of file: ./repos/goHackTools/vendor/github.com/oschwald/maxminddb-golang
    
    the code of the file until where you have to start completion: // +build appengine plan9

package maxminddb

import "io/ioutil"

// Open takes a string path to
    
func Open(file string) (*Reader, error) {
	bytes, err := ioutil.ReadFile(file)
	if err != nil {
		return nil, err
	}

	return FromBytes(bytes)
}