code: def test_shutdown():
      target_addr = ("127.0.0.1", 7000)
      set_show_addr(target_addr)
  
      success = wait_for_reachable()
      assert success
  
      actual_response = shutdown_show_server()
      expected_response = True
      assert actual_response == expected_response
  
      # NOTE: Running it twice should still work.
      actual_response = shutdown_show_server()
      expected_response = True
      assert actual_response == expected_response
  
imports: from interpret import set_show_addr, get_show_addr, shutdown_show_server, status_show_server
  from interpret import show, init_show_server, preserve, get_visualize_provider, set_visualize_provider
  from ..tutils import synthetic_classification
  from interpret.glassbox import LogisticRegression
  from interpret import show_link
  import requests
  import os
  import tempfile
  import pytest
  from interpret.provider import PreserveProvider
label_desc: Use image node_id 4 for calling a global function with example usage: test_shutdown() without return types