code: def create_summary_metadata():
      """Create a `SummaryMetadata` proto for custom scalar plugin data.
  
      Returns:
        A `summary_pb2.SummaryMetadata` protobuf object.
      """
      return summary_pb2.SummaryMetadata(
          plugin_data=summary_pb2.SummaryMetadata.PluginData(
              plugin_name=PLUGIN_NAME
          )
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: create_summary_metadata() and returns: summary_pb2