code: func (c *LRU) Get(key interface{}) (value interface{}, ok bool) {
  	if ent, ok := c.items[key]; ok {
  		c.evictList.MoveToFront(ent)
  		return ent.Value.(*entry).value, true
  	}
  	return
  }
docs: // Get looks up a key's value from the cache.