docstr: Tests empty EventMultiplexer creation.
docstr_tok: ["Tests","empty","EventMultiplexer","creation","."]
code: def testEmptyLoader(self):
      """Tests empty EventMultiplexer creation."""
      x = event_multiplexer.EventMultiplexer()
      self.assertEqual(x.Runs(), {})
  
imports: import os
  import os.path
  import shutil
  import tensorflow
  from tensorboard.backend.event_processing import event_accumulator
  from tensorboard.backend.event_processing import event_multiplexer
label_desc: Use image node_id 3 for calling the EventMultiplexerTest obj's underlying member method code with example usage: obj.testEmptyLoader() without return types