code: def kill_agent(self) -> None:
      self.dc.kill_stage("agent1")
  
      WAIT_FOR_KILL = 5
      for _i in range(WAIT_FOR_KILL):
          agent_data = get_agent_data(conf.make_master_url())
          if len(agent_data) == 0:
              break
          if len(agent_data) == 1 and agent_data[0]["draining"] is True:
              break
          time.sleep(1)
      else:
          pytest.fail(
              f"Agent is still present after {WAIT_FOR_KILL} seconds"
          )
  
imports: import json
  import os
  import subprocess
  import time
  from typing import Any, Dict, Iterator, List, Union, cast
  import pytest
  from tests import config
  from .abstract_cluster import Cluster
  from .test_users import logged_in_user
  from .utils import now_ts, set_master_port
label_desc: Use image node_id 7 for calling the ManagedCluster obj's underlying member method code with example usage: obj.kill_agent() without return types