code: func newHelperMethodContent(ln *line, rslt *result, src *source, parent element, opts *Options) (*helperMethodContent, error) {
  	if len(ln.tokens) < 3 || ln.tokens[2] == "" {
  		return nil, fmt.Errorf("no name is specified [file: %s][line: %d]", ln.fileName(), ln.no)
  	}
  
  	e := &helperMethodContent{
  		elementBase: newElementBase(ln, rslt, src, parent, opts),
  		name:        ln.tokens[2],
  	}
  
  	return e, nil
  }
docs: // newHelperMethodContent creates and returns a helper method content.