this.packedIntsVersion = reader.packedIntsVersion;
this.compressionMode = reader.compressionMode;
this.decompressor = reader.decompressor.clone();
this.chunkSize = reader.chunkSize;
this.numDocs = reader.numDocs;
this.reader = new BlockPackedReaderIterator(vectorsStream, packedIntsVersion, BLOCK_SIZE, 0);
this.version = reader.version;
this.closed = false;
}