code: def testCoerceStructure(self, target, source, expect):
      coerced = nest_util.coerce_structure(target, source)
      self.assertAllEqualNested(expect, coerced)
  
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 12 for calling the NestUtilTest obj's underlying member method code with example usage: obj.testCoerceStructure(target, source, expect) without return types