code: function ChunkWriter(chunkRW, options) {
      if (!(this instanceof ChunkWriter)) {
          return new ChunkWriter(chunkRW, options);
      }
      Transform.call(this, options);
      this._writableState.objectMode = true;
      this._readableState.objectMode = false;
      this.chunkRW = chunkRW;
  }
docs: TODO: pre-allocated buffer strategies