class_docstr: Tests properties of the Bijector base-class.
code: def testIsAbstract(self):
      # In Python 3.9, "abstract methods" become "abstract method"
      with self.assertRaisesRegex(
          TypeError,
          r"Can't instantiate abstract class Bijector "
          r"with.* abstract method '?__init__'?",
      ):
          bijector.Bijector()
  
imports: import abc
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops.distributions import bijector
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the BaseBijectorTest obj's underlying member method code with example usage: obj.testIsAbstract() without return types