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: cpu.go
    path of file: ./repos/agones/vendor/golang.org/x/sys/cpu
    
    the code of the file until where you have to start completion: // Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package cpu implements processor feature detection for
// various CPU architectures.
package cpu

import (
	"os"
	"strings"
)

// Initialized reports whether the CPU features were initialized.
//
// For some GOOS/GOARCH combinations initializ
    
func processOptions() {
	env := os.Getenv("GODEBUG")
field:
	for env != "" {
		field := ""
		i := strings.IndexByte(env, ',')
		if i < 0 {
			field, env = env, ""
		} else {
			field, env = env[:i], env[i+1:]
		}
		if len(field) < 4 || field[:4] != "cpu." {
			continue
		}
		i = strings.IndexByte(field, '=')
		if i < 0 {
			print("GODEBUG sys/cpu: no value specified for \"", field, "\"\n")
			continue
		}
		key, value := field[4:i], field[i+1:] // e.g. "SSE2", "on"

		var enable bool
		switch value {
		case "on":
			enable = true
		case "off":
			enable = false
		default:
			print("GODEBUG sys/cpu: value \"", value, "\" not supported for cpu option \"", key, "\"\n")
			continue field
		}

		if key == "all" {
			for i := range options {
				options[i].Specified = true
				options[i].Enable = enable || options[i].Required
			}
			continue field
		}

		for i := range options {
			if options[i].Name == key {
				options[i].Specified = true
				options[i].Enable = enable
				continue field
			}
		}

		print("GODEBUG sys/cpu: unknown cpu feature \"", key, "\"\n")
	}

	for _, o := range options {
		if !o.Specified {
			continue
		}

		if o.Enable && !*o.Feature {
			print("GODEBUG sys/cpu: can not enable \"", o.Name, "\", missing CPU support\n")
			continue
		}

		if !o.Enable && o.Required {
			print("GODEBUG sys/cpu: can not disable \"", o.Name, "\", required CPU feature\n")
			continue
		}

		*o.Feature = o.Enable
	}
}