func (s *Scratch) Set(k string, v interface{}) string {
	s.init()

	s.Lock()
	defer s.Unlock()
	s.values[k] = v
	return ""
}
func (s *Scratch) Set(k string, v interface{}) string {
	s.init()

	s.Lock()
	defer s.Unlock()
	s.values[k] = v
	return ""
}
func ( s * Scratch ) Set ( k string , v interface { } ) string { s . init ( ) s . Lock ( ) defer s . Unlock ( ) s . values [ k ] = v return " " }
// Set stores the value v at the key k. It will overwrite an existing value
// if present.
Set stores the value v at the key k . It will overwrite an existing value if present .