code: def test_lrn(self):  # type: () -> None
      _test_single_node(
          "LRN",
          [(1, 3, 224, 224)],
          [(1, 3, 224, 224)],
          alpha=9.99e-5,
          beta=0.75,
          bias=1.0,
          size=5,
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import unittest
  import numpy
  from coremltools._deps import _HAS_ONNX, MSG_ONNX_NOT_FOUND
  from typing import Text
  from coremltools.models.utils import _macos_version
label_desc: Use image node_id 11 for calling the SingleOperatorTest obj's underlying member method code with example usage: obj.test_lrn() without return types