code: def testAddReloadWithMultipleThreads(self):
      x = event_multiplexer.EventMultiplexer(max_reload_threads=2)
      x.Reload()
      x.AddRun("run1")
      x.AddRun("run2")
      x.AddRun("run3")
      self.assertTrue(x.GetAccumulator("run1").reload_called)
      self.assertTrue(x.GetAccumulator("run2").reload_called)
      self.assertTrue(x.GetAccumulator("run3").reload_called)
  
imports: import os
  import os.path
  import queue
  import shutil
  import tensorflow
  from tensorboard.backend.event_processing import plugin_event_accumulator
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.util import test_util
label_desc: Use image node_id 18 for calling the EventMultiplexerTest obj's underlying member method code with example usage: obj.testAddReloadWithMultipleThreads() without return types