code: def init_app(self, app: Flask) -> None:
      self._ssh_manager = load_class_from_name(
          app.config["SSH_TUNNEL_MANAGER_CLASS"]
      )(app)
  
file_path: superset/superset/extensions/ssh.py
imports: import logging
  from io import StringIO
  from typing import TYPE_CHECKING
  import sshtunnel
  from flask import Flask
  from paramiko import RSAKey
  from superset.databases.utils import make_url_safe
  from superset.utils.class_utils import load_class_from_name
label_desc: Use image node_id 2 for calling the SSHManagerFactory obj's underlying member method code with example usage: obj.init_app(app) without return types