func MustTagKey(key string) tag.Key {
	t, err := tag.NewKey(key)
	if err != nil {
		panic(err)
	}
	return t
}
// MustTagKey creates a new `tag.Key` from a string, panic if the key is not a valid.
MustTagKey creates a new `tag.Key` from a string, panic if the key is not a valid.
// MustTagKey creates a new ` tag . Key ` from a string panic if the key is not a valid .
func MustTagKey(key string) tag.Key {
	t, err := tag.NewKey(key)
	if err != nil {
		panic(err)
	}
	return t
}
func MustTagKey ( key string ) tag . Key { t , err := tag . NewKey ( key ) if err != nil { panic ( err ) } return t }
MustTagKey creates a new `tag.Key` from a string, panic if the key is not a valid.
MustTagKey creates a new ` tag . Key ` from a string panic if the key is not a valid .