code: def svn_mirror_url():
      """Return the URL for the SVN mirror
  
      Use the value of the environment variable, "CP_SVNMIRROR_URL" with
      a default of http://cellprofiler.org/svnmirror.
      """
      return os.environ.get(
          "CP_SVNMIRROR_URL", "https://cellprofiler.org/svnmirror"
      )
  
file_path: CellProfiler/tests/core/modules/__init__.py
imports: import os
  import tempfile
  import logging
  import functools
  import hashlib
  import numpy
  import unittest
  from urllib.request import URLopener
  import skimage.io
  import cellprofiler_core.utilities.legacy
label_desc: Use image node_id 3 for calling a global function with example usage: svn_mirror_url() and returns: os