code: def testBool(self):
      for obj in self.objects[1:]:
          self.assertFalse(not not obj)
          self.assertTrue(not obj)
          self.assertFalse(obj)
  
imports: from mpi4py import MPI
  import mpiunittest
  import ctypes
  import operator
  import weakref
  import sys
label_desc: Use image node_id 4 for calling the TestObjModel obj's underlying member method code with example usage: obj.testBool() without return types