class_docstr: Stores and caches configuration for Internal API.
code: def get_internal_api_endpoint():
      if not InternalApiConfig._initialized:
          InternalApiConfig._init_values()
      return InternalApiConfig._internal_api_endpoint
  
file_path: airflow/airflow/api_internal/internal_api_call.py
imports: from __future__ import annotations
  import inspect
  import json
  from functools import wraps
  from typing import Callable, TypeVar
  import requests
  from airflow.configuration import conf
  from airflow.exceptions import AirflowConfigException, AirflowException
  from airflow.settings import _ENABLE_AIP_44
  from airflow.typing_compat import ParamSpec
label_desc: Use image node_id 3 for calling the InternalApiConfig obj's underlying member method code with example usage: obj.get_internal_api_endpoint() and returns: InternalApiConfig