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: parser.go
    path of file: ./repos/wails/v2/pkg/menu/keys
    
    the code of the file until where you have to start completion: package keys

import (
	"fmt"
	"strconv"
	"strings"

	"github.com/leaanthony/slicer"
)

var namedKeys = slicer.String([]string{"backspace", "tab", "return", "enter", "escape", "left", "right", "up", "down", "space", "delete", "home", "end", "page up", "page down", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f
    
func parseKey(key string) (string, bool) {
	// Lowercase!
	key = strings.ToLower(key)

	// Check special case
	if key == "plus" {
		return "+", true
	}

	// Handle named keys
	if namedKeys.Contains(key) {
		return key, true
	}

	// Check we only have a single character
	if len(key) != 1 {
		return "", false
	}

	runeKey := rune(key[0])

	// This may be too inclusive
	if strconv.IsPrint(runeKey) {
		return key, true
	}

	return "", false
}