func (s *Scratch) Get(k string) interface{} {
	s.RLock()
	defer s.RUnlock()
	return s.values[k]
}
func (s *Scratch) Get(k string) interface{} {
	s.RLock()
	defer s.RUnlock()
	return s.values[k]
}
func ( s * Scratch ) Get ( k string ) interface { } { s . RLock ( ) defer s . RUnlock ( ) return s . values [ k ] }
// Get returns a value previously set by Add or Set
Get returns a value previously set by Add or Set