code: def test_get(self):
      layout_map = distribution_lib.LayoutMap(self.device_mesh)
      layout_map["dense/kernel"] = self.sharded_2d
      layout_map["dense/bias"] = self.sharded_1d
  
      layout_map["dense.*kernel"] = self.replicated_2d
      layout_map["dense.*bias"] = self.replicated_1d
  
      layout_map["bias"] = self.sharded_1d
  
      self.assertEqual(layout_map["dense/kernel"], self.sharded_2d)
      self.assertEqual(layout_map["dense/bias"], self.sharded_1d)
  
      self.assertEqual(layout_map["dense_2/kernel"], self.replicated_2d)
      # Map against the wildcard bias rule for dense. This will cause a
      # ValueError
      with self.assertRaisesRegex(
          ValueError, "Path 'dense_2/bias' matches multiple layout"
      ):
          layout_map["dense_2/bias"]
  
      self.assertIsNone(layout_map["conv2d/kernel"])
      self.assertEqual(layout_map["conv2d/bias"], self.sharded_1d)
  
imports: import os
  from unittest import mock
  import numpy
  import pytest
  import tensorflow
  from keras import backend
  from keras import testing
  from keras.backend import distribution_lib
  from keras.distribution import distribution_lib
label_desc: Use image node_id 3 for calling the LayoutMapTest obj's underlying member method code with example usage: obj.test_get() without return types