code: def test_preserve(explanation):
      # Overall
      result = preserve(explanation)
      assert result is None
  
      # Integer indexing
      selector_key = 0
      result = preserve(explanation, selector_key)
      assert result is None
  
      # Index by selector first column value
      selector_key = "A"
      result = preserve(explanation, selector_key)
      assert result is None
  
      # # Handle text explanations
      # result = preserve(text_explanation)
      # assert result is None
  
      # Output to file
      path = os.path.join(
          tempfile.mkdtemp(), "test_preserve_output.html"
      )
      preserve(
          explanation, selector_key, file_name=path, auto_open=False
      )
      assert os.stat(path).st_size > 0
  
      os.remove(path)
  
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 10 for calling a global function with example usage: test_preserve(explanation) without return types