docs: def update_task(self, differences):
          """
          Updates a task as done if we have a new value for this alternative language
  
          :param differences:
          :return:
          """
  
          self.log('differences UPDATING: {}'.format(differences))
  
          object_name = '{} - {}'.format(self.app_label, self.instance.master._meta.verbose_name)
          lang = self.instance.language_code
          object_pk = self.instance.master.pk
  
          for field in differences:
              value = getattr(self.instance, field)
              if value is None or value == '':
                  continue
              try:
                  TransTask.objects.filter(
                      language__code=lang, object_field=field, object_name=object_name, object_pk=object_pk
                  ).update(done=True, date_modification=datetime.now(), object_field_value_translation=value)
                  self.log('MARKED TASK AS DONE')
              except TransTask.DoesNotExist:
                  self.log('error MARKING TASK AS DONE: {} - {} - {} - {}'.format(lang, field, object_name, object_pk))