code: def testMultiThreadedConstructorCallWorks(self):
      def init_writer():
          debug_events_writer.DebugEventsWriter(
              self.dump_root, self.tfdbg_run_id
          )
  
      num_threads = 4
      threads = []
      for _ in range(num_threads):
          thread = threading.Thread(target=init_writer)
          thread.start()
          threads.append(thread)
      for thread in threads:
          thread.join()
  
      # Verify that there is only one debug event file of each type.
      metadata_paths = glob.glob(
          os.path.join(self.dump_root, "*.metadata")
      )
      self.assertLen(metadata_paths, 1)
      source_files_paths = glob.glob(
          os.path.join(self.dump_root, "*.source_files")
      )
      self.assertLen(source_files_paths, 1)
      stack_frames_paths = glob.glob(
          os.path.join(self.dump_root, "*.stack_frames")
      )
      self.assertLen(stack_frames_paths, 1)
      graphs_paths = glob.glob(os.path.join(self.dump_root, "*.graphs"))
      self.assertLen(graphs_paths, 1)
      self._readAndCheckMetadataFile()
  
imports: import glob
  import json
  import os
  import re
  import threading
  import time
  from absl.testing import parameterized
  from tensorflow.core.protobuf import debug_event_pb2
  from tensorflow.python.debug.lib import debug_events_reader
  from tensorflow.python.debug.lib import debug_events_writer
  from tensorflow.python.debug.lib import dumping_callback_test_lib
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework import versions
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 1 for calling the DebugEventsWriterTest obj's underlying member method code with example usage: obj.testMultiThreadedConstructorCallWorks() without return types