code: def add_category_tag(self, tags, append_lists=True):
          
          tags = element_resolver(tags)
          self.update(
              category_parent_ref=tags,
              append_lists=append_lists)
docs: Add this category to a category tag (group). This provides drop down
          filters in the SMC UI by category tag.
          
          :param list tags: category tag by name
          :param bool append_lists: append to existing tags or overwrite
              default: append)
          :type tags: list(str)
          :return: None