code: def testRaisesEmptyBijectors(self):
      with self.assertRaisesRegexp(
          ValueError, "`bijectors` must not be empty"
      ):
          blockwise.Blockwise(bijectors=[])
  
imports: from absl.testing import parameterized
  import mock
  import tensorflow.compat.v1
  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 exp
  from tensorflow_probability.python.bijectors import inline
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.bijectors import scale_matvec_diag
  from tensorflow_probability.python.bijectors import softmax_centered
  from tensorflow_probability.python.bijectors import softplus
  from tensorflow_probability.python.internal import tensorshape_util
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 7 for calling the BlockwiseBijectorTest obj's underlying member method code with example usage: obj.testRaisesEmptyBijectors() without return types