docstr: Verify that the bijector is properly invertible.
docstr_tok: ["Verify","that","the","bijector","is","properly","invertible","."]
code: def testBijector(self):
      """Verify that the bijector is properly invertible."""
      bijection = self._create_glow()
      self.assertStartsWith(bijection.bijectors[1].name, "glow")
      self.evaluate([v.initializer for v in bijection.variables])
      x = self._make_images()
  
      x = tf.constant(x, tf.float32)
      z = bijection.inverse(x)
      xprime = bijection.forward(tf.identity(z))
      zprime = bijection.inverse(xprime)
  
      # Absolute errors are < 1e-4, and need to use absolute since dealing with
      # values surrounding 0.
      self.assertAllClose(x, xprime, rtol=0.0, atol=1.0e-4)
      self.assertAllClose(z, zprime, rtol=0.0, atol=1.0e-4)
      self.assertAllClose(
          self.evaluate(-bijection.inverse_log_det_jacobian(x, 3)),
          self.evaluate(bijection.forward_log_det_jacobian(z, 1)),
          rtol=1e-4,
          atol=0.0,
      )
  
imports: import functools
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector_test_util
  from tensorflow_probability.python.bijectors import blockwise
  from tensorflow_probability.python.bijectors import chain
  from tensorflow_probability.python.bijectors import composition
  from tensorflow_probability.python.bijectors import glow
  from tensorflow_probability.python.bijectors import identity
  from tensorflow_probability.python.bijectors import pad
  from tensorflow_probability.python.bijectors import sigmoid
  from tensorflow_probability.python.distributions import independent
  from tensorflow_probability.python.distributions import normal
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.internal import tf_keras
  from tensorflow_probability.python.math.gradient import batch_jacobian
label_desc: Use image node_id 4 for calling the GlowTest obj's underlying member method code with example usage: obj.testBijector() without return types