code: def log_backend_action(action=None):
      
      def decorator(func):
          @functools.wraps(func)
          def wrapped(self, instance, *args, **kwargs):
              action_name = func.func_name.replace('_', ' ') if action is None else action
  
              logger.debug('About to %s `%s` (PK: %s).', action_name, instance, instance.pk)
              result = func(self, instance, *args, **kwargs)
              logger.debug('Action `%s` was executed successfully for `%s` (PK: %s).',
                           action_name, instance, instance.pk)
              return result
          return wrapped
      return decorator
docs: Logging for backend method.
  
      Expects django model instance as first argument.