code: def setUp(self):
      super().setUp()
      if tf2 is None:
          self.skipTest("v3 histogram summary API not available")
  
imports: import glob
  import os
  import numpy
  import tensorflow
  from tensorboard.compat import tf2
  from tensorboard.compat.proto import summary_pb2
  from tensorboard.plugins.histogram import metadata
  from tensorboard.plugins.histogram import summary
  from tensorboard.util import tensor_util
label_desc: Use image node_id 1 for calling the SummaryV3OpTest obj's underlying member method code with example usage: obj.setUp() without return types