@Override
    public TsBlock get() {
      return timeValuePairIterator.getBatch(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