code: def test_layer_norm(self, input_shape, eps, backend):
      model = nn.LayerNorm(input_shape, eps=eps)
      run_compare_torch(input_shape, model, backend=backend)
  
imports: import sys
  from coremltools.converters.mil import testing_reqs
  from coremltools.converters.mil.testing_reqs import *
  from .testing_utils import *
label_desc: Use image node_id 1 for calling the TestLayerNorm obj's underlying member method code with example usage: obj.test_layer_norm(input_shape, eps, backend) without return types