path: "tensorflow.SummaryMetadata.PluginData"
tf_proto {
  descriptor {
    name: "PluginData"
    field {
      name: "plugin_name"
      number: 1
      label: LABEL_OPTIONAL
      type: TYPE_STRING
    }
    field {
      name: "content"
      number: 2
      label: LABEL_OPTIONAL
      type: TYPE_BYTES
    }
  }
}