code: def _get_log_model_class(self):
          
          if self.log_model_class is not None:
              return self.log_model_class
  
          app_label, model_label = self.log_model.rsplit('.', 1)
          self.log_model_class = apps.get_model(app_label, model_label)
          return self.log_model_class
docs: Cache for fetching the actual log model object once django is loaded.
  
          Otherwise, import conflict occur: WorkflowEnabled imports <log_model>
          which tries to import all models to retrieve the proper model class.