code: @Override
  	public int close() throws IOException {
  		if (!writer.isClosed()) {
  			int currentPositionInSegment = getCurrentPositionInSegment();
  			// write last segment
  			writer.writeBlock(getCurrentSegment());
  			clear();
  
  			writer.getReturnQueue().clear();
  			this.writer.close();
  
  			return currentPositionInSegment;
  		}
  		return -1;
  	}
docs: Closes this OutputView, closing the underlying writer. And return number bytes in last
  memory segment.