code: def get_title(self, plural=True):
          
          value = self.title
          if value == self.parent_attr:
              return self.parent.get_title(plural=plural)
  
          if not value and self._meta.model:
              value = helpers.model_name(self._meta.model,
                                         self._meta.custom_model_name,
                                         self._meta.custom_model_name_plural,
                                         plural)
          elif self.title and plural:
              value = helpers.pluralize(self.title, self.title_plural)
  
          return helpers.capfirst_if_needed(value)
docs: Get's the title of the bundle. Titles can be singular
          or plural.