code: def is_all_initialized(self):
          '''Return whether all the instances have been initialized.
  
          Returns:
              bool
          '''
          return frozenset(self._class_map.keys()) == \
              frozenset(self._instance_map.keys()f is_all_initialized(self):
          '''Return whether all the instances have been initialized.
  
          Returns:
              bool
          '''
          return frozenset(self._class_map.keys()) == \
              frozenset(self._instance_map.keys())
docs: Return whether all the instances have been initialized.
  
          Returns:
              bool