code: def test_reuse_failure(self):
      self._initialize_model(writer=self.logdir)
      self.model.fit(x=[(1,)], y=[(2,)], callbacks=[self.callback])
      with self.assertRaisesRegex(
          RuntimeError, "cannot be reused across training sessions"
      ):
          self.model.fit(x=[(1,)], y=[(2,)], callbacks=[self.callback])
  
file_path: tensorboard/tensorboard/plugins/hparams/_keras_test.py
imports: import os
  from unittest import mock
  from google.protobuf import text_format
  import tensorflow
  from tensorboard.plugins.hparams import _keras
  from tensorboard.plugins.hparams import metadata
  from tensorboard.plugins.hparams import plugin_data_pb2
  from tensorboard.plugins.hparams import summary_v2
label_desc: Use image node_id 6 for calling the CallbackTest obj's underlying member method code with example usage: obj.test_reuse_failure() without return types