code: def delete_dag(
      dag_id: str, session: Session = NEW_SESSION
  ) -> APIResponse:
      """Delete the specific DAG."""
      from airflow.api.common import delete_dag as delete_dag_module
  
      try:
          delete_dag_module.delete_dag(dag_id, session=session)
      except DagNotFound:
          raise NotFound(f"Dag with id: '{dag_id}' not found")
      except AirflowException:
          raise AlreadyExists(
              detail=f"Task instances of dag with id: '{dag_id}' are still running"
          )
  
      return NoContent, HTTPStatus.NO_CONTENT
  
imports: from __future__ import annotations
  from http import HTTPStatus
  from typing import TYPE_CHECKING, Collection
  from connexion import NoContent
  from flask import g, request
  from marshmallow import ValidationError
  from sqlalchemy import select, update
  from sqlalchemy.sql.expression import or_
  from airflow.api_connexion import security
  from airflow.api_connexion.exceptions import AlreadyExists, BadRequest, NotFound
  from airflow.api_connexion.parameters import apply_sorting, check_limit, format_parameters
  from airflow.api_connexion.schemas.dag_schema import DAGCollection, DAGCollectionSchema, DAGDetailSchema, DAGSchema, dag_schema, dags_collection_schema
  from airflow.exceptions import AirflowException, DagNotFound
  from airflow.models.dag import DagModel, DagTag
  from airflow.utils.airflow_flask_app import get_airflow_app
  from airflow.utils.db import get_query_count
  from airflow.utils.session import NEW_SESSION, provide_session
  from airflow.www.extensions.init_auth_manager import get_auth_manager
label_desc: Use image node_id 6 for calling a global function with example usage: delete_dag(dag_id, session) and returns: NoContent,  HTTPStatus