code: def test_builder_to_backend_smoke_with_dynamic_shape(
      self, compute_unit, backend
  ):
      x_val = np.array(
          [[[1.0, -7.0], [5.0, -6.0], [-3.0, -5.0]]], dtype=np.float32
      )
      shape = (get_new_symbol(), get_new_symbol(), 2)
      input_placeholders = {"x": mb.placeholder(shape=shape)}
      input_values = {"x": x_val}
  
      def build(x):
          return [
              mb.layer_norm(x=x, axes=[2], epsilon=1e-4),
          ]
  
      expected_output_types = [(UNK_SYM, UNK_SYM, 2, types.fp32)]
      expected_outputs = [
          np.array(
              [
                  [
                      [0.9999969, -0.9999969],
                      [0.99999833, -0.99999833],
                      [0.99995005, -0.99995005],
                  ]
              ],
              dtype=np.float32,
          ),
      ]
  
      run_compare_builder(
          build,
          input_placeholders,
          input_values,
          expected_output_types,
          expected_outputs,
          inputs=construct_inputs_from_placeholders(
              input_placeholders, 10
          )
          if backend.backend == "mlprogram"
          else None,
          compute_unit=compute_unit,
          backend=backend,
      )
  
imports: import itertools
  import platform
  import numpy
  import pytest
  import coremltools
  from coremltools._deps import _HAS_TF_2, _HAS_TORCH, MSG_TF2_NOT_FOUND, MSG_TORCH_NOT_FOUND
  from coremltools.converters.mil.mil import Builder
  from coremltools.converters.mil.mil import Function, get_new_symbol, types
  from coremltools.converters.mil.mil.ops.tests.iOS14 import backends
  from coremltools.converters.mil.mil.ops.tests.testing_utils import UNK_SYM, construct_inputs_from_placeholders, run_compare_builder
  from coremltools.converters.mil.testing_reqs import compute_units
  from coremltools.converters.mil.testing_utils import random_gen
label_desc: Use image node_id 5 for calling the TestNormalizationLayerNorm obj's underlying member method code with example usage: obj.test_builder_to_backend_smoke_with_dynamic_shape(compute_unit, backend) and returns: list