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: options_gen.go
    path of file: ./repos/plumber/vendor/github.com/pierrec/lz4/v4
    
    the code of the file until where you have to start completion: // Code generated by "stringer -type=BlockSize,CompressionLevel -output options_gen.go"; DO NOT EDIT.

package lz4

import "strconv"

func _() {
	// An "invalid array index" compiler error signifies that t
    
func (i BlockSize) String() string {
	switch {
	case i == 65536:
		return _BlockSize_name_0
	case i == 262144:
		return _BlockSize_name_1
	case i == 1048576:
		return _BlockSize_name_2
	case i == 4194304:
		return _BlockSize_name_3
	default:
		return "BlockSize(" + strconv.FormatInt(int64(i), 10) + ")"
	}
}