code: def is_rss_variant_enabled():
      if (
          "BUILD_RSS_VARIANT" in os.environ
          and os.environ["BUILD_RSS_VARIANT"] == "true"
      ):
          return True
      return False
  
imports: from setuptools import setup, Extension
  import fnmatch
  import os
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: is_rss_variant_enabled() and returns: False, True