code: def _launch(self):
      return launch.launch
  
imports: import signal
  import threading
  from absl import flags
  from absl.testing import absltest
  from absl.testing import parameterized
  from launchpad import context
  from launchpad import program
  from launchpad.launch import serialization_test
  from launchpad.launch.test_multi_threading import launch
  from launchpad.nodes.python import node
  from launchpad.program_stopper import program_stopper
  import mock
label_desc: Use image node_id 1 for calling the SerializationTest obj's underlying member method code with example usage: obj._launch() and returns: launch