code: def get_reverb_packages():
      """Returns list of required packages if using reverb."""
      reverb_packages = []
      if FLAGS.release:
          tf_version = TENSORFLOW_VERSION
          reverb_version = REVERB_VERSION
          rlds_version = RLDS_VERSION
      else:
          tf_version = TENSORFLOW_NIGHTLY
          reverb_version = REVERB_NIGHTLY
          rlds_version = RLDS_NIGHTLY
  
      # Overrides required versions if FLAGS are set.
      if FLAGS.tf_version:
          tf_version = FLAGS.tf_version
      if FLAGS.reverb_version:
          reverb_version = FLAGS.reverb_version
      if FLAGS.rlds_version:
          rlds_version = FLAGS.rlds_version
  
      reverb_packages.append(rlds_version)
      reverb_packages.append(reverb_version)
      reverb_packages.append(tf_version)
      return reverb_packages
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import argparse
  import codecs
  import datetime
  import fnmatch
  import io
  import os
  import subprocess
  import sys
  import unittest
  from setuptools import find_packages
  from setuptools import setup
  from setuptools.command.test import test
  from setuptools.dist import Distribution
  import version
label_desc: Use image node_id 5 for calling a global function with example usage: get_reverb_packages() and returns: reverb_packages