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: io.go
    path of file: ./repos/corteza/extra/server-discovery/vendor/github.com/lestrrat-go/jwx/jwt
    
    the code of the file until where you have to start completion: // Automatically generated by internal/cmd/genreadfile/main.go. DO NOT EDIT

package jwt

import "os"

// ReadFileOption describes options that can be passed to ReadFile.
type ReadFileOption interface {
	Option
	readFileOption()
}

func ReadFile(path string, options ...ReadFileOption) (Token, error) {
	var
    
func ReadFile(path string, options ...ReadFileOption) (Token, error) {
	var parseOptions []ParseOption
	for _, option := range options {
		switch option := option.(type) {
		case ParseOption:
			parseOptions = append(parseOptions, option)
		}
	}

	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}

	defer f.Close()
	return ParseReader(f, parseOptions...)
}