code: def testBroadcastStructure(
      self, from_structure, to_structure, expected
  ):
      ret = nest_util.broadcast_structure(to_structure, from_structure)
      self.assertAllEqual(expected, ret)
  
imports: import collections
  from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import deterministic
  from tensorflow_probability.python.distributions import half_cauchy
  from tensorflow_probability.python.distributions import joint_distribution_auto_batched
  from tensorflow_probability.python.distributions import normal
  from tensorflow_probability.python.internal import nest_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow.python.util import nest
label_desc: Use image node_id 1 for calling the NestUtilTest obj's underlying member method code with example usage: obj.testBroadcastStructure(from_structure, to_structure, expected) without return types