code: def test_suite():
      return unittest.TestLoader().loadTestsFromName(__name__)
  
imports: import threading
  import unittest
  from .testutils import ConnectingTestCase, skip_before_postgres, slow
  from .testutils import skip_if_crdb
  import psycopg2
  from psycopg2.extensions import ISOLATION_LEVEL_SERIALIZABLE, STATUS_BEGIN, STATUS_READY
label_desc: Use image node_id 1 for calling a global function with example usage: test_suite() and returns: unittest