code: def testEmptyAccumulator(self):
      gen = _EventGenerator(self)
      x = ea.EventAccumulator(gen)
      x.Reload()
      self.assertTagsEqual(x.Tags(), {})
  
imports: import os
  import numpy
  import tensorflow
  from tensorboard.backend.event_processing import event_accumulator
  from tensorboard.compat.proto import config_pb2
  from tensorboard.compat.proto import event_pb2
  from tensorboard.compat.proto import graph_pb2
  from tensorboard.compat.proto import meta_graph_pb2
  from tensorboard.compat.proto import summary_pb2
  from tensorboard.plugins.distribution import compressor
  from tensorboard.util import tensor_util
  from tensorboard.util import test_util
  from tensorboard.util import tb_logging
label_desc: Use image node_id 3 for calling the MockingEventAccumulatorTest obj's underlying member method code with example usage: obj.testEmptyAccumulator() without return types