code: def test_builder_to_backend_broadcast(self, compute_unit, backend):
      x = np.array([[1, 2, 3], [4, 5, 6]], dtype=np.float32)
      input_placeholders = {"x": mb.placeholder(shape=x.shape)}
      input_values = {"x": x}
  
      def build(x):
          # y is const
          return mb.less(x=x, y=3.5)
  
      expected_output_types = (2, 3, types.bool)
      expected_outputs = np.array([[1, 1, 1], [0, 0, 0]], dtype=bool)
  
      run_compare_builder(
          build,
          input_placeholders,
          input_values,
          expected_output_types,
          expected_outputs,
          compute_unit=compute_unit,
          backend=backend,
      )
  
imports: import itertools
  import numpy
  import pytest
  from coremltools.converters.mil.mil import Builder
  from coremltools.converters.mil.mil import get_new_symbol, types
  from coremltools.converters.mil.mil.ops.tests.iOS14 import backends
  from coremltools.converters.mil.mil.ops.tests.testing_utils import run_compare_builder
  from coremltools.converters.mil.testing_reqs import compute_units
  from coremltools.converters.mil.testing_utils import ssa_fn
label_desc: Use image node_id 3 for calling the TestLess obj's underlying member method code with example usage: obj.test_builder_to_backend_broadcast(compute_unit, backend) and returns: mb