concurrent

type CacheResult struct {
	V     interface{}
	Found bool
}

type LRUCache interface {
	GetMultiple(keys []string) []CacheResult
	Get(key string) (v interface{}, found bool)
	Set(key string, v interface{})
	SetMultiple(keyValues map[string]interface{})
	Delete(keys ...string)
	Clear()
}

type Map interface {
	Get(key interface{}) (interface{}, bool)
	Set(key interface{}, value interface{})
	Delete(key interface{})
	Len() int
}