code: def test_GET(self):
      self.assertEqual(self.sc.GET("test"), "GET")
      self.sc.network_wrapper.GET.assert_called_once_with(
          "endpoint/test", None, None
      )
  
imports: import json
  import requests
  from requests.auth import HTTPBasicAuth
  from tabpy.tabpy_tools.rest import RequestsNetworkWrapper, ServiceClient
  import unittest
  from unittest.mock import Mock
label_desc: Use image node_id 2 for calling the TestServiceClient obj's underlying member method code with example usage: obj.test_GET() without return types