in shardedlru.go [143:152]
func (lru *ShardedLRU[K, V]) Add(key K, value V) (evicted bool) {
hash := lru.hash(key)
shard := (hash >> 16) & lru.mask
lru.mus[shard].Lock()
evicted = lru.lrus[shard].add(hash, key, value)
lru.mus[shard].Unlock()
return
}