text: from sphene.sphboard.categorytypes import DefaultCategoryType
  from sphene.sphboard.categorytyperegistry import CategoryType
  from django.utils.translation import ugettext_lazy as _
  
  class CommentsCategoryType(DefaultCategoryType):
      """
      Defines the "root" category for comments.
      """
      name = 'sphcomments'
      label = 'Comments Category'
  
      def is_displayed(self):
          return False
  
  
  class CommentsOnObjectCategoryType(DefaultCategoryType):
      name = 'sphcommentsonobject'
      label = 'Comments On Object (Do not create this by hand.)'
  
      def get_absolute_url_for_category(self):
          url = None
          try:
              url = self.category.sphcomments_config.get() \
                  .content_object.get_absolute_url()
              if not url:
                  url = None
          except:
              pass
          return url
  
      def get_post_new_thread_label(self):
          return _("New comment")
  