code: func HTMLReadability(r io.Reader) []byte {
  	jr := justext.NewReader(r)
  
  	// TODO: Improve this!
  	jr.Stoplist = readabilityStopList
  	jr.LengthLow = HTMLReadabilityOptionsValues.LengthLow
  	jr.LengthHigh = HTMLReadabilityOptionsValues.LengthHigh
  	jr.StopwordsLow = HTMLReadabilityOptionsValues.StopwordsLow
  	jr.StopwordsHigh = HTMLReadabilityOptionsValues.StopwordsHigh
  	jr.MaxLinkDensity = HTMLReadabilityOptionsValues.MaxLinkDensity
  	jr.MaxHeadingDistance = HTMLReadabilityOptionsValues.MaxHeadingDistance
  
  	paragraphSet, err := jr.ReadAll()
  	if err != nil {
  		log.Println("Justext:", err)
  		return nil
  	}
  
  	useClasses := strings.SplitN(HTMLReadabilityOptionsValues.ReadabilityUseClasses, ",", 10)
  
  	output := ""
  	for _, paragraph := range paragraphSet {
  		for _, class := range useClasses {
  			if paragraph.CfClass == class {
  				output += paragraph.Text + "\n"
  			}
  		}
  	}
  
  	return []byte(output)
  }
docs: // HTMLReadability extracts the readable text in an HTML document