@TestOnly
  public Chunk get(
      ChunkCacheKey chunkCacheKey, List<TimeRange> timeRangeList, Statistics chunkStatistic)
      throws IOException {
    LongConsumer emptyConsumer = l -> {};
    return get(
        chunkCacheKey,
        timeRangeList,
        chunkStatistic,
        false,
        emptyConsumer,
        emptyConsumer,
        emptyConsumer);
  }
This class is used to cache <code>Chunk</code> of <code>ChunkMetaData</code> in IoTDB. The
caching strategy is LRU.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/buffer/ChunkCache.java