code: def testSymmetric(self, bijector_class, event_ndims, bijector_params):
      self._testSpace(bijector_class, event_ndims, bijector_params)
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import exp
  from tensorflow_probability.python.bijectors import reshape
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.experimental.tangent_spaces import spaces_test_util
  from tensorflow_probability.python.experimental.tangent_spaces import symmetric_matrix
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math import linalg
label_desc: Use image node_id 1 for calling the ConstantDiagonalThreeDSymmetricMatrix obj's underlying member method code with example usage: obj.testSymmetric(bijector_class, event_ndims, bijector_params) without return types