code: def load_plugin(self, run_names):
      (logdir, multiplexer) = self.load_runs(run_names)
      provider = data_provider.MultiplexerDataProvider(
          multiplexer, logdir
      )
      ctx = base_plugin.TBContext(logdir=logdir, data_provider=provider)
      return histograms_plugin.HistogramsPlugin(ctx)
  
imports: import collections.abc
  import os.path
  import tensorflow
  from tensorboard import errors
  from tensorboard import context
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.backend.event_processing import tag_types
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.histogram import histograms_plugin
  from tensorboard.plugins.histogram import summary
  from tensorboard.util import test_util
label_desc: Use image node_id 3 for calling the HistogramsPluginTest obj's underlying member method code with example usage: obj.load_plugin(run_names) and returns: histograms_plugin