public void setTsBlockIndex(int tsBlockIndex) {
      this.tsBlockIndex = tsBlockIndex;
    }
TsBlockSupplier enables to read pages in MemTable lazily. All MemPageReaders share one
TsBlockSupplier object.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/read/reader/chunk/MemChunkReader.java