code: def build_batched_operator(self):
      seed = test_util.test_seed()
      return tf.linalg.LinearOperatorBlockDiag(
          [
              tf.linalg.LinearOperatorDiag(
                  tf.random.normal(
                      (2, 3, 4), dtype=tf.float32, seed=seed
                  )
              ),
              tf.linalg.LinearOperatorIdentity(3),
          ],
          is_non_singular=True,
      )
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import scale_matvec_linear_operator
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 2 for calling the ScaleMatvecLinearOperatorBlockDiagTest obj's underlying member method code with example usage: obj.build_batched_operator() and returns: tf