code: def test_get_method(self):
      loss = losses_module.get("mse")
      self.assertEqual(loss, losses_module.mean_squared_error)
  
      loss = losses_module.get(None)
      self.assertEqual(loss, None)
  
      with self.assertRaises(ValueError):
          losses_module.get("typo")
  
imports: import numpy
  import pytest
  from keras import backend
  from keras import losses
  from keras import ops
  from keras import testing
  from keras.losses.loss import Loss
label_desc: Use image node_id 8 for calling the LossTest obj's underlying member method code with example usage: obj.test_get_method() without return types