docs: def get_full_perm(perm, obj):
      """Join action with the content type of ``obj``.
  
      Permission is returned in the format of ``<action>_<object_type>``.
      """
      ctype = ContentType.objects.get_for_model(obj)
      # Camel case class names are converted into a space-separated
      # content types, so spaces have to be removed.
      ctype = str(ctype).replace(' ', '')
  
      return '{}_{}'.format(perm.lower(), ctype)