code: def mock_init(
      self,
      gcp_conn_id,
      impersonation_chain=None,
  ):
      pass
  
imports: from __future__ import annotations
  from unittest import mock
  from uuid import UUID
  import httplib2
  import pytest
  from google.api_core.exceptions import AlreadyExists, GoogleAPICallError
  from google.api_core.gapic_v1.method import DEFAULT
  from google.cloud.exceptions import NotFound
  from google.cloud.pubsub_v1.types import ReceivedMessage
  from googleapiclient.errors import HttpError
  from airflow.providers.google.cloud.hooks.pubsub import PubSubAsyncHook, PubSubException, PubSubHook
  from airflow.providers.google.common.consts import CLIENT_INFO
  from airflow.version import version
label_desc: Use image node_id 1 for calling a global function with example usage: mock_init(gcp_conn_id, impersonation_chain) without return types