code: def test_counter_threading(self):
      counter = counting.Counter()
      num_threads = 10
      barrier = Barrier(num_threads)
  
      # Increment in every thread at the same time.
      def add_to_counter():
          barrier.wait()
          counter.increment(foo=1)
  
      # Run the threads.
      threads = []
      for _ in range(num_threads):
          t = threading.Thread(target=add_to_counter)
          t.start()
          threads.append(t)
      for t in threads:
          t.join()
  
      # Make sure the counter has been incremented once per thread.
      counts = counter.get_counts()
      self.assertEqual(counts["foo"], num_threads)
  
file_path: acme/acme/utils/counting_test.py
imports: import threading
  from acme.utils import counting
  from absl.testing import absltest
label_desc: Use image node_id 1 for calling the CountingTest obj's underlying member method code with example usage: obj.test_counter_threading() without return types