code: def _canSetEmptyEnvironmentVariable():
      """
        Unfortunately different OSs (and possibly Python implementations as well)
      have different interpretations of what it means to set an evironment
      variable to an empty string. Some (e.g. Windows) interpret it as unsetting
      the variable and some (e.g. AIX or Darwin) actually set it to an empty
      string.
  
      """
      dummyName = "UGNABUNGA_FOO_BAR_BAZ_FEE_FAE_FOU_FAM"
      original = os.environ.get(dummyName)
      _env_set(dummyName, "")
      result = _getExternalEnv(dummyName) == ""
      _env_set(dummyName, original)
      return result
  
file_path: turicreate/src/external/boost/boost_1_68_0/tools/build/test/configuration.py
imports: import BoostBuild
  import TestCmd
  import os
  import os.path
  import re
label_desc: Use image node_id 2 for calling a global function with example usage: _canSetEmptyEnvironmentVariable() and returns: result