docs: def clean(self, *args, **kwargs):
          """
          Call self.synchronizer.clean method
          """
          if self.synchronizer_path != 'None' and self.config:
              # call synchronizer custom clean
              try:
                  self.synchronizer.load_config(self.config)
                  self.synchronizer.clean()
              except ImproperlyConfigured as e:
                  raise ValidationError(e.message)