https://github.com/apache/airflow/blob/main/airflow/cli/commands/task_command.py#L145
"""Multiple delete action."""
        self.datamodel.delete_all(items)
        self.update_redirect()
        return redirect(self.get_redirect())
    def pre_add(self, item):
        """Pre add hook."""
        item.execution_date = timezone.make_aware(item.execution_date)
        item.value = XCom.serialize_value(
            value=item.value,
            key=item.key,
            task_id=item.task_id,
            dag_id=item.dag_id,
            run_id=item.run_id,
            map_index=item.map_index,
        )
    def pre_update(self, item):
        """Pre update hook."""
        item.execution_date = timezone.make_aware(item.execution_date)
        item.value = XCom.serialize_value(
            value=item.value,
            key=item.key,
            task_id=item.task_id,
            dag_id=item.dag_id,
            run_id=item.run_id,
            map_index=item.map_index,
        )
#
#
class ConnectionFormWidget(FormWidget):