docs: def get_class(class_string):
      """
      Convert a string version of a function name to the callable object.
      """
      try:
          mod_name, class_name = get_mod_func(class_string)
          if class_name != '':
              cls = getattr(__import__(mod_name, {}, {}, ['']), class_name)
              return cls
      except (ImportError, AttributeError):
          pass
      raise ImportError('Failed to import %s' % class_string)