code: def get_variables_path(export_dir):
      """Return the variables path, used as the prefix for checkpoint files."""
      return file_io.join(
          compat.as_text(get_variables_dir(export_dir)),
          compat.as_text(constants.VARIABLES_FILENAME),
      )
  
file_path: tensorflow-upstream/tensorflow/python/saved_model/path_helpers.py
imports: from tensorflow.python.lib.io import file_io
  from tensorflow.python.saved_model import constants
  from tensorflow.python.util import compat
label_desc: Use image node_id 3 for calling a global function with example usage: get_variables_path(export_dir) and returns: file_io