code: def setUp(self):
      super(StreamDependencyTests, self).setUp()
      origin_execution_mode = os.environ[
          "_python_worker_execution_mode"
      ]
      os.environ["_python_worker_execution_mode"] = "loopback"
      try:
          self.t_env = TableEnvironment.create(
              EnvironmentSettings.in_streaming_mode()
          )
          self.t_env.get_config().set("parallelism.default", "2")
          self.t_env.get_config().set(
              "python.fn-execution.bundle.size", "1"
          )
      finally:
          if origin_execution_mode is not None:
              os.environ[
                  "_python_worker_execution_mode"
              ] = origin_execution_mode
  
imports: import os
  import shutil
  import sys
  import unittest
  import uuid
  from pyflink.table import DataTypes, TableEnvironment, EnvironmentSettings
  from pyflink.table import expressions
  from pyflink.table.udf import udf
  from pyflink.testing import source_sink_utils
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 1 for calling the StreamDependencyTests obj's underlying member method code with example usage: obj.setUp() without return types