try:
                        callback(dag, task_list, blocking_task_list, slas, blocking_tis)
                        notification_sent = True
                    except Exception:
                        Stats.incr(
                            "sla_callback_notification_failure",
                            tags={
                                "dag_id": dag.dag_id,
                                "func_name": callback.__name__,
                            },
                        )
                        self.log.exception(
                            "Could not call sla_miss_callback(%s) for DAG %s",
                            callback.__name__,
                            dag.dag_id,
                        )
            email_content = f"""\
            Here's a list of tasks that missed their SLAs:
            <pre><code>{task_list}\n<code></pre>
            Blocking tasks:
            <pre><code>{blocking_task_list}<code></pre>
            Airflow Webserver URL: {conf.get(section='webserver', key='base_url')}
            """
            tasks_missed_sla = []
            for sla in slas:
                try:
                    task = dag.get_task(sla.task_id)
                except TaskNotFound:
                    
                    self.log.warning(