docs: def log(self, msg):
          """
          Log a message information adding the master_class and instance_class if available
  
          :param msg:
          :return:
          """
          if self.master_class and self.instance_class:
              logger.info('{0} - {1} - {2} - {3} - lang: {4} msg: {5}'.format(
                  self.ct_master.app_label, self.ct_master.model,
                  self.instance_class, self.instance.language_code, self.instance.pk, msg)
              )
          elif self.instance_class:
              logger.info('{} - {}: {}'.format(self.instance_class, self.instance.pk, msg))
          else:
              logger.info('{}'.format(msg))