code: def __init__(self, x):
      super().__init__()
      test_utils.TestCase.__init__(self)
      self.x = x
  
imports: from absl.testing import parameterized
  from sonnet.src import base
  from sonnet.src import mixed_precision
  from sonnet.src import test_utils
  import tensorflow
  import tree
label_desc: Use image node_id 1 to create a new DummyVar object from inherited base classes: base, test_utils with example: obj = DummyVar(x)