class_docstr: Interact with OpenFaaS to query, deploy, invoke and update function.
  
  :param function_name: Name of the function, Defaults to None
  :param conn_id: openfaas connection to use, Defaults to open_faas_default
      for example host : http://openfaas.faas.com, Connection Type : Http
code: def get_conn(self):
      conn = self.get_connection(self.conn_id)
      return conn
  
file_path: airflow/airflow/providers/openfaas/hooks/openfaas.py
imports: from __future__ import annotations
  from typing import Any
  import requests
  from airflow.exceptions import AirflowException
  from airflow.hooks.base import BaseHook
label_desc: Use image node_id 2 for calling the OpenFaasHook obj's underlying member method code with example usage: obj.get_conn() and returns: conn