new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from wdom.tag import NewTagClass as NewTag
  from wdom.tag import *
  
  
  css_files = [
      '_static/css/kube.min.css',
  ]
  
  
  class TypedButton(Button):
      type_ = None
      outline = False
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          if self.type_:
              self.setAttribute('type', self.type_)
          if self.outline:
              self.setAttribute('outline', True)
  
  DefaultButton = NewTag('DefaultButton', 'button', TypedButton, type_='black',
                         outline=True)
  PrimaryButton = NewTag('PrimaryButton', 'button', TypedButton, type_='primary')
  SuccessButton = NewTag('SuccessButton', 'button', TypedButton, type_='black')
  InfoButton = NewTag('InfoButton', 'button', TypedButton, type_='primary',
                      outline=True)
  WarningButton = NewTag('WarningButton', 'button', TypedButton)
  DangerButton = NewTag('DangerButton', 'button', TypedButton)
  LinkButton = NewTag('LinkButton', 'button', TypedButton, outline=True)
  
  Form = NewTag('Form', 'form', Form, class_='forms')
  Select = NewTag('Select', 'select', Select, class_='select')
  
  Row = NewTag('Row', 'row', Div)
  
  class Column(Div):
      tag = 'column'
      cols = 1
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
          self.setAttribute('cols', str(self.cols))
  
  Col1 = NewTag('Col1', 'column', Column)
  Col2 = NewTag('Col2', 'column', Column, cols=2)
  Col3 = NewTag('Col3', 'column', Column, cols=3)
  Col4 = NewTag('Col4', 'column', Column, cols=4)
  Col5 = NewTag('Col5', 'column', Column, cols=5)
  Col6 = NewTag('Col6', 'column', Column, cols=6)
  Col7 = NewTag('Col7', 'column', Column, cols=7)
  Col8 = NewTag('Col8', 'column', Column, cols=8)
  Col9 = NewTag('Col9', 'column', Column, cols=9)
  Col10 = NewTag('Col10', 'column', Column, cols=10)
  Col11 = NewTag('Col11', 'column', Column, cols=11)
  
subject: Add kube css theme