code: func (e *helperMethodInclude) WriteTo(w io.Writer) (int64, error) {
  	var s string
  
  	if e.pipeline == "" {
  		s = fmt.Sprintf(actionTemplate, e.opts.DelimLeft, e.templateName, e.opts.DelimRight)
  	} else {
  		s = fmt.Sprintf(actionTemplateWithPipeline, e.opts.DelimLeft, e.templateName, e.pipeline, e.opts.DelimRight)
  	}
  
  	i, err := w.Write([]byte(s))
  
  	return int64(i), err
  }
docs: // WriteTo writes data to w.