110                                      WriterID writer_id,  in CopyChunkUntrusted()  argument
150   record.writer_id = writer_id;  in CopyChunkUntrusted()
305   auto producer_and_writer_id = std::make_pair(producer_id_trusted, writer_id);  in CopyChunkUntrusted()
372           key.producer_id, key.writer_id, key.chunk_id,  in DeleteNextChunksFor()
413                                         WriterID writer_id,  in TryPatchChunkContents()  argument
418   ChunkMeta::Key key(producer_id, writer_id, chunk_id);  in TryPatchChunkContents()
443                       producer_id, writer_id, chunk_id, chunk_end - chunk_begin,  in TryPatchChunkContents()
499         std::tie(prev_it->first.producer_id, prev_it->first.writer_id) <  in GetReadIterForSequence()
500             std::tie(seq_begin->first.producer_id, seq_begin->first.writer_id));  in GetReadIterForSequence()
514   auto producer_and_writer_id = std::make_pair(key.producer_id, key.writer_id);  in GetReadIterForSequence()
600     const WriterID writer_id = read_iter_.writer_id();  in ReadNextTracePacket()  local
675           *sequence_properties = {trusted_producer_id, trusted_uid, writer_id};  in ReadNextTracePacket()
700         *sequence_properties = {trusted_producer_id, trusted_uid, writer_id};  in ReadNextTracePacket()
742                     it.writer_id() == read_iter_.writer_id());  in ReadAhead()