new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from wdom.tag import NewTagClass as NewTag
  from wdom.tag import *
  
  
  css_files = [
      '//cdn.jsdelivr.net/picnicss/5.1.0/picnic.min.css',
  ]
  
  Button = NewTag('Button', bases=Button)
  DefaultButton = NewTag('DefaultButton', 'button', Button)
  PrimaryButton = NewTag('PrimaryButton', 'button', Button)
  SuccessButton = NewTag('SuccessButton', 'button', Button, class_='success')
  InfoButton = NewTag('InfoButton', 'button', Button)
  WarningButton = NewTag('WarningButton', 'button', Button, class_='warning')
  DangerButton = NewTag('DangerButton', 'button', Button, class_='error')
  LinkButton = NewTag('LinkButton', 'button', Button, class_='pseudo')
  
subject: Add picnic css