code: def get_metadata(self, event):
      return metadata.parse_plugin_metadata(
          event.summary.value[0].metadata.plugin_data.content
      )
  
imports: import glob
  import json
  import os
  import tensorflow
  from tensorboard.compat import tf2
  from tensorboard.plugins.mesh import summary
  from tensorboard.plugins.mesh import metadata
  from tensorboard.plugins.mesh import plugin_data_pb2
  from tensorboard.plugins.mesh import test_utils
label_desc: Use image node_id 4 for calling the MeshSummaryV2Test obj's underlying member method code with example usage: obj.get_metadata(event) and returns: metadata