code: def test_summarywriter_flush_after_close(self):
      log_dir = tempfile.mkdtemp()
      summary_writer = SummaryWriter(log_dir=log_dir)
      summary_writer.close()
      with self.assertRaises(AttributeError):
          summary_writer.flush()
  
imports: import itertools
  import pathlib
  import tempfile
  import numpy
  import tensorflow
  from absl.testing import absltest
  from tensorboard.backend.event_processing import directory_watcher, event_file_loader
  from tensorboard.util import tensor_util
  from flax.metrics.tensorboard import SummaryWriter, _flatten_dict
label_desc: Use image node_id 2 for calling the TensorboardTest obj's underlying member method code with example usage: obj.test_summarywriter_flush_after_close() without return types