code: def depickle_legacy_package_name_compatible(pickled_string):
      """Backward compatible way of depickling old pickled strings.
  
      Previously petastorm package was named differently. In order to be able to load older datasets, we modify
      module names in the pickled stream with the new ones.
  
      :param pickled_string: A pickled string to be passed to pickle.loads
      :return:
      """
      LEGACY_PACKAGE_NAMES = [
          "av.experimental.deepdrive.dataset_toolkit",
          "av.ml.dataset_toolkit",
      ]
      LEGACY_MODULES = ["codecs", "unischema", "sequence"]
  
      for legacy_package_name in LEGACY_PACKAGE_NAMES:
          for legacy_module in LEGACY_MODULES:
              # Substitute module names directly in the pickled stream. Encode as 'ascii' to make sure no non-ascii
              # character made its way into package/module name
              legacy_package_entry = "\n(c{}.{}\n".format(
                  legacy_package_name, legacy_module
              ).encode("ascii")
              new_module_name = "\n(cpetastorm.{}\n".format(
                  legacy_module
              ).encode("ascii")
              modified_pickled_string = pickled_string.replace(
                  legacy_package_entry, new_module_name
              )
              if modified_pickled_string != pickled_string:
                  logger.warning(
                      'Depickling "%s.%s" which has moved to "petastorm.%s". '
                      "Regenerate metadata.",
                      legacy_package_name,
                      legacy_module,
                      legacy_module,
                  )
  
              pickled_string = modified_pickled_string
  
      return restricted_loads(pickled_string)
  
imports: import logging
  from six.moves import cPickle
  import io
label_desc: Use image node_id 2 for calling a global function with example usage: depickle_legacy_package_name_compatible(pickled_string) and returns: restricted_loads