func keyNames(keys []*Key) []string {
	n := make([]string, 0, len(keys))
	for _, k := range keys {
		n = append(n, k.StringID())
	}
	return n
}
func keyNames(keys []*Key) []string {
	n := make([]string, 0, len(keys))
	for _, k := range keys {
		n = append(n, k.StringID())
	}
	return n
}
func keyNames ( keys [ ] * Key ) [ ] string { n := make ( [ ] string , 0 , len ( keys ) ) for _ , k := range keys { n = append ( n , k . StringID ( ) ) } return n }
// keyNames returns a slice of the provided keys' names (string IDs).
keyNames returns a slice of the provided keys names ( string IDs ) .