code: def test_config(self):
      logcosh_obj = metrics.LogCoshError(name="logcosh", dtype="int32")
      self.assertEqual(logcosh_obj.name, "logcosh")
      self.assertEqual(logcosh_obj._dtype, "int32")
  
imports: import numpy
  from absl.testing import parameterized
  from keras import testing
  from keras.metrics import regression_metrics
label_desc: Use image node_id 2 for calling the LogCoshErrorTest obj's underlying member method code with example usage: obj.test_config() without return types