code: def setup_method(self) -> None:
      clear_db_connections(add_default_connections_back=False)
      clear_db_variables()
  
file_path: airflow/tests/cli/commands/test_rotate_fernet_key_command.py
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from cryptography.fernet import Fernet
  from airflow.cli import cli_parser
  from airflow.cli.commands import rotate_fernet_key_command
  from airflow.hooks.base import BaseHook
  from airflow.models import Connection, Variable
  from airflow.utils.session import provide_session
  from tests.test_utils.config import conf_vars
  from tests.test_utils.db import clear_db_connections, clear_db_variables
label_desc: Use image node_id 2 for calling the TestRotateFernetKeyCommand obj's underlying member method code with example usage: obj.setup_method() without return types